Gems Sensors FS-105E & FS-107E in-line adjustable flow switch

  • Piston type, in-line flow switch
  • Wetted materials: nickel plated brass, brass & stainless steel
  • Process connections: G¼", ½" & 1" (BSPP) female thread
  • Output: SPST, NO or SPDT switches (reed switches)
    • Models available with visual flow indication
  • Adjustable ranges: models for 0.005 » 90L/min
    • Viscosity compensated models available for oil applications
    • Maximum flow 100% above max. set point
  • Temperature: -20 » 120°C
  • Pressure: 250bar
  • Enclosure: DIN 43650 plug with mating connector (IP65)
  • Mount in any orientation with minimum flow conditioning before or after the switch
  • Stocked models include:
    • FS-105E: 027-0104, 027-0110, 027-0111, 027-0113, 027-0114 & 027-0130
    • FS-107E: 027-0301, 027-0302, 027-0303, 027-0309 & 027-0312
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  • FS-105E + FS-107E - datasheet (PDF)
  • FS-107E - manual (PDF)
  • FS-105E - manual (PDF)
  • Gems Sensors - Reed switch protection (PDF)
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    Gems Sensors FS-3 compact in-line flow switch

    • Noryl (R) body
    • Piston type sensor
    • G¼” BSPP fitting ( ¼” NPT available )
    • SPST NO Reed Switch 20VA, 0-240VAC/DC
    • 0.19 – 3.78 L/min settings
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  • FS-3 specs (PDF)
  • Gems Sensors - Reed switch protection (PDF)
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    Gems Sensors FS-380P in-line, plastic, flow switch

    • Polypropylene body
    • Piston type sensor
    • 3/8” NPTM fitting ( adaptors available )
    • SPST NO Reed Switch 10VA, 0-240VAC/DC
    • 0.95 – 7.57 Litres/min settings
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  • FS-380P specs (PDF)
  • Gems Sensors - Reed switch protection (PDF)
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    Gems Sensors FS-380 compact in-line, high pressure, small flow switches

    • Brass or Stainless Steel body
    • Piston type sensor
    • 3/8” & 1/2” MNPT , 3/8” compression fitting
    • SPST NO Reed Switch 20VA, 0-240VAC/DC
    • 0.95 » 7.57 L/min settings
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  • FS-380 specs (PDF)
  • Gems Sensors - Reed switch protection (PDF)
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    Gems Sensors FS-4 compact, in-line, plastic flow switch

    • Ryton (R) body
    • Piston type sensor
    • 9/16”-18 UNF fitting ( 900)
    • SPST NO Reed Switch 20VA, 0-240VAC/DC
    • 0.38 – 5.67 Litres/min settings
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  • FS-4 specs (PDF)
  • Gems Sensors - Reed switch protection (PDF)
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    Gems Sensors FS-150 in-line flow switch

    • Polypropylene body
    • Piston type sensor
    • 1/2” MNPT fitting
    • SPST NO Reed Switch 20VA, 0-240VAC/DC
    • 2 – 18.5 Litres/min settings
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  • FS-150 specs (PDF)
  • Gems Sensors - Reed switch protection (PDF)
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    Gems Sensors FS-925 + FS-926 precision flow switches

    • Piston type flow switches for liquids & gases
    • Brass or 316SS body
    • Fixed set-points: precision calibrated
      • Accuracy: ±10%
      • FS-925 (general): 0.38 » 5.68L/min (liquid); 0.5 » 25SCFM (air)
      • FS-926 (low flow): 0.05 » 0.3L/min (liquid); 2 » 50SCFH (air);
      • Repeatability: ±1% F.S
      • Set point differential: 15% (max)
    • Process connection: ¼” NPTF thread
    • Output: SPDT, 20VA (reed switch)
    • Temperature: -29 » 107°C (other available)
    • Pressure:  69bar (1,000PSIg)
    • Enclosure: lead wires (not weatherproof / IP65)
    Back to top
  • FS-925 (general) + FS-926 (low flow) precision flow switches for gases & liquids - datasheet (PDF)
  • FS-925 + FS-926 - manual (PDF)
  • Gems Sensors - Reed switch protection (PDF)
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    Gems Sensors FS-927 compact, precision flow switch

    • Brass or 316 Stainless Steel body
    • Piston type sensor
    • 1/4” FNPT fitting
    • SPDT NO Reed Switch 20VA, 0-240VAC/DC
    • 0.38 – 5.67 Litres/min settings
    Back to top
  • FS-927 specs (PDF)
  • Gems Sensors - Reed switch protection (PDF)
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    Gems Sensors FS-930 viscosity compensating oil flow switch

    • Brass body
    • Piston type sensor
    • 1/4” FNPT fitting
    • SPDT NO Reed Switch 20VA, 0-240VAC/DC
    • 0.38 – 75.67 Litres/min settings
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  • FS-930 specs (PDF)
  • Gems Sensors - Reed switch protection (PDF)
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    FS-10798 externally adjustable flow switch

    • Brass or Stainless Steel body
    • Piston type sensor
    • 1/2” FNPT fitting
    • SPDT NO Reed Switch 20VA, 0-240VAC/DC
    • 1.89 – 75.7 Litres/min settings
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  • FS-10798 specs (PDF)
  • Gems Sensors - Reed switch protection (PDF)
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    Gems Sensors FS-100 & FS-100E in-line, adjustable flow switch

    • Brass body
    • Piston type sensor
    • 3/8” BSPT fitting
    • SPST NO or NC Reed Switch 40VA, 2A, 240VAC
    • 2 – 15 Litres/min pre- settings ( FS-100E )
    • 1-16 Litres/min adjustable setting ( FS-100E-A )
    Back to top
  • FS-100E & E-A specs (PDF)
  • Gems Sensors - Reed switch protection (PDF)
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    FS-200 & FS-200E in-line, heavy duty flow switch with fixed setpoints

    • Choice of set points (water) from:
      • 0.5 » 100GPM (1.9 » 378.5L/min)
      • 1% repeatability
      • ±10% accuracy
      • 15% differential (hysteresis)
    • Bronze or 316SS body
    • Shuttle type sensor
    • Connection: 1”, 1¼”, 1½”, 2” NPTF or G1" fitting
    • Switch: SPDT, 20VA reed switch
    • Media: -29»148°C, 400PSIg (27.6bar)
    • Optional aluminium or 316SS junction box (IP65) with pre-wired terminal strip - 240Vac version available with lock-out screw
    • Repair kits also available
    • Stocked versions:
      • FS-200: 27051, 27053, 27054, 27055, 27056, 27057, 27059, 27060, 27061, 27062, 27064, 27085
      • FS-200E: 020-2407, 020-3481, 020-0783, 020-0799
    Back to top
  • FS-200 (with junction box) - datasheet (PDF)
  • FS-200E - datasheet (PDF)
  • FS-200 with 316SS junction boxes (PDF)
  • FS-200 with AL junction boxes (PDF)
  • FS-200 + FS-200A - installation instructions (PDF)
  • FS-200E + FS-200E-A - installation instructions (PDF)
  • Gems Sensors - Reed switch protection (PDF)
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    FS-200A & FS-200E-A in-Line, heavy duty flow switch with adjustable setpoints

    Choice of adjustable setpoints (water):

      • 1»6GPM (3.8»22.7L/min), 5»15 (18.9»56.7L/min) or 2»8GPM (7.5»30.2L/min)
      • 1% repeatability
      • ±10% accuracy
      • 15% differential (hysteresis)
    • Bronze or 316SS body
    • Shuttle type sensor
    • Connection: G1" or 1” NPTF fitting
    • Switch: SPDT, 20VA reed switch
    • Media: -29»93°C, 400PSIg (27.6bar)
    • Stocked versions available
    • Optional aluminium or 316SS junction box (IP65) with pre-wired terminal strip - 240Vac version available with lock-out screw
    • Stocked versions:
      • FS-200A: 26615, 26616, 26838
      • FS-200E-A: 020-2416, 020-2417, 020-2418
    Back to top
  • FS-200A (with junction box) - datasheet (PDF)
  • FS-200E-A - datasheet (PDF)
  • FS-200 with 316SS junction boxes (PDF)
  • FS-200 with AL junction boxes (PDF)
  • FS-200 + FS-200A - installation instructions (PDF)
  • FS-200E + FS-200E-A - installation instructions (995-0108, Issue B) (PDF)
  • Gems Sensors - Reed switch protection (PDF)
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    Gems Sensors FS-400 in-line, heavy duty adjustable flow switch

    • Heavy duty shuttle type, in-line flow switch
    • Bronze body
    • Refer to datasheet for pressure drop curves
    • Process connection: ¾” NPTF thread
    • Output: SPDT, 20VA (reed switch)
    • Fixed set-points: 2.8 » 37.8L/min
    • Adjustable ranges: 2.8 » 53 L/min
    • Temperature: -29 » 82°C
    • Pressure: 27bar (400PSIg)
    • Enclosure: flying leads (not weatherproof / IP65)
    • Optional, locally fitted weatherproof junction box (with pre-wired terminal strip) from aluminium or 316SS
    • Stocked models include: 26600, 26601 & 26602
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  • FS-400 shuttle type flow switch (with junction box) - datasheet (PDF)
  • FS-400 - manual (Bulletin 45523, Rev.P) (PDF)
  • Gems Sensors - Reed switch protection (PDF)
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    Gems Sensors FS-400P in-line plastic flow switch

    • In-line shuttle type flow switch
    • Clear PVC body
    • Process connection: ½” NPTF, ¾” IPS or 1” IPS
    • Output: SPST (20VA) normally open (@ no flow) reed switch
    • Fixed set-points: 1.9L/min (0.5GPM) or 7.6L/min (2GPM) with ±20% set point accuracy
    • Stocked models: 135805, 135810 & 135815
      • Repair kits also available
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  • Gems Sensors FS-400P - datasheet (PDF)
  • FS-400P - manual (PDF)
  • Gems Sensors - Reed switch protection (PDF)
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    Gems Sensors FS-500P in-line plastic flow switch

    • • Polypropylene body
    • • Shuttle type sensor
    • • 3/4” BSPP fitting
    • • SPST Reed Switch 20VA, 0-240VAC/DC
    • • 1, 2, 3.5, 10 & 18.5 Litres/min “flow” units
    Back to top
  • FS-500P UK specs (PDF)
  • Gems Sensors - Reed switch protection (PDF)
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    Gems Sensors FS-550 + FS-550E paddle flow switch

    • Brass or 316 stainless steel body
    • Patented cam design, senses bi-directional flow
    • Process connection: 1”NPT (FS-550) or R1" (BSPT FS-550E)
    • Pipe sizes: 1¼” & larger
    • Output: SPDT 20VA (reed switch)
    • Pressure: 55 bar (depends on model)
    • Temperature: -20 » 80°C (depend on model)
    • Adjustable range: refer manual for flow setting vs pipe size & paddle length
    • Stocked models:
      • FS-550: 29608, 29609
      • FS-550E (some with Certificate of Conformance): 020-3497, 020-3499
    Back to top
  • FS-550 - catalogue (with junction box) (PDF)
  • FS-550E - catalogue (PDF)
  • FS-550 - manual (PDF)
  • FS-550E - manual (PDF)
  • FS-550 paddle type flow switch general operating principle (JPG)
  • Gems US - reed switch protection (PDF)
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    Gems Sensors RFI (RotorFlow) paddle wheel indicator

    • Paddle wheel flow indicator for visual flow indication
    • Materials: polypropylene, brass or stainless steel body
    • Media: dependent on body type
        • -29 » 100°C (65°C ambient), up to 13bar
        • Viscosity: <200SSU
    • Process connections: ¼, ½, ¾ & 1” NPT or BSPP (G type) thread
    • Range: dependent on port size
      • Flow: 0.38 » 76L/min (0.1 » 20GPM)
    • Typical stocked units include: 142541, 142542, 155420, 155480, 174596, 180392BSPP, 181683
      • Note: repair kits available for some models
    Back to top
  • RFI - datasheet (RotorFlow flow indicator) (PDF)
  • RFI - manual (Bulletin 157259, Rev.F) (PDF)
  • RotorFlow - complete section (PDF)
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    Gems Sensors LS-7 Side mount, Engineered Plastics, Low Cost

    • Use on liquids with SG’s as low as 0.55
    • Materials: model dependent - Polypropylene, Nylon, Versaplast
    • Temperature: -40 » 148.9°C
    • Pressure: 3, 7 & 10 bar (model dependent)
    • Output: SPST reed switch (20VA)
      • NO/NC selectable
    • Process connection: various connections
      • ½”NPT threaded (some models available with BSP)
      • external & internal mount models
      • expansion plug
    • Electrical connection:  24" flying leads - NOT IP65 (weatherproof)
      • The Type 7 models have a ½" NPT threaded conduit connection which can be used for easy weatherproofing of the elctrical connection.
      • Optional junction box (AL or 316SS) with pre-wired terminal can be added to the Type 7 on request.
    • Typical stock units include: 131100, 140620, 160450, 160460, 164520, 165570, 165800, 177100, 181041, 181291, 182600, 189423 & 191080
    Back to top
  • LS-7 - plastic models datasheet (PDF)
  • Junction box alternatives V6 (PDF)
  • LS-7 Plastic + TC20AL (Small) (JPG)
  • LS-7 plastic models - installation instructions (Bulletin 78803, Rev.Y) (PDF)
  • Gems Sensors - Reed switch protection (PDF)
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    Gems Sensors LS-7 Side mount, Stainless Steel & Alloys

    • Corrosion resistant, rugged
    • Use on liquids with SG’s as low as 0.55
    • Materials: model dependent - 316 stainless steel, zinc / nylon or zinc / polypropylene
    • Temperature: -40 » 148.9°C
    • Pressure: 7, 10 & 20 bar (model dependent)
    • Output: SPST reed switch (20VA)
      • NO/NC selectable
    • Process connection: various connections
      • ½”NPT threaded (some models available with BSP)
      • external & internal mount models
      • expansion plug
    • Electrical connection:  24" flying leads - NOT IP65 (weatherproof)
      • The Type 7 models have a ½" NPT threaded conduit connection which can be used for easy weatherproofing of the elctrical connection.
      • Optional junction box (AL or 316SS) with pre-wired terminal can be added to the Type 7 on request.
    • Typical stock units include: 155680, 164860, 164870
    Back to top
  • LS-7 - alloy + metallic models datasheet (PDF)
  • Junction box alternatives V6 (PDF)
  • 316SS LS-7 + 316SS IP65 junction box alternatives (JPG)
  • LS-7 alloy - installation instructions (Bulletin 160375, Rev.F) (PDF)
  • Gems Sensors - Reed switch protection (PDF)
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    Gems Sensors LS-3 compact, engineered plastic float level switch

    • Compact, durable float type level switches for OEM & low cost applications
    • Mounting: top or bottom mounted (vertical) - range of thread types available
    • Wetted materials: choice of Polypropylene (PP), Polysulfone, Nylon & FDA-approved PVDF
    • Output: SPST (swappable NO / NC on-site) reed switch, 20VA
    • S.G.: choice of floats for liquids with specific gravities as low as 0.45
    • Temperature: -40 » 121°C
    • Pressure: from 3 » 10bar (50»150PSIg), depending on the model
    • Electrical connection: typically lead wires, not IP65 (i.e. not weatherproof without additional protection)
    • Special models available for unusual applications, including stilling tube / sloosh shield for turbulent tanks.
    • Stocked models include: 116826, 142505, 142545, 163931, 171512, 173250, 189787, 201540, 220280, 42295, 65656 & 76707
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  • LS-3 family - datasheets (PDF)
  • LS-3 - manual (PDF)
  • Gems Sensors - Reed switch protection (PDF)
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    Gems Sensors LS-750P custom float switch

    • Hybrid unit custom designed for OEM applications like rain water tanks with small openings
      • Weighted unit with submersible cabling & slosh shield to prevent switch chatter in turbulent liquid
      • Combination of Gems LS-3 (p/n: 142545) & LS-750 (p/n: 149350), both of which are also stocked parts
    • Mounting: hung directly into tank
    • Wetted materials: brass, PP (polypropylene float) & PVC cable
    • Output: SPST (swappable NO / NC on-site) reed switch (20VA)
    • Temperature: ranges -40 » 65°C
    • Pressure: up to 10bar @ 30°C
    • S.G.: (vary between models) >0.9
    • Electrical connection: waterproof, 7.5m PVC cable connection
    • Stocked models: 016-4151
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  • LS-750P (016-4151) - datasheet (PDF)
  • CCPL LS-750P - instructions (LS-750 + LS-3) (PDF)
  • Gems Sensors - Reed switch protection (PDF)
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    Gems Sensors LS-30, LS-74780 + LS-1900TFE engineered plastic float switches for aggressive or ultra-pure liquids

    • Polysulfone, CPVC, PTFE
    • Use on liquids with Specific Gravities as low as 0.55
    • Temperatures -40 to 107°C, 82°C, 149°C respectively
    • Pressure ranges to 3 bar, 1 bar, 2 bar respectively
    • SPST reed switch 20VA, 240VAC, NO/NC selectable
    • 1/4” NPT mounting
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  • Large Size Engineered Plastic specs (PDF)
  • Gems Sensors - Reed switch protection (PDF)
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    Gems Sensors LS-1750 & LS-1755 top / bottom mount, small size, stainless steel float switches

    • 316 stainless steel wetted parts
    • Corrosion resistant materials, rugged
    • Temperature: from 40 up to 249°C - dependent of model
    • Pressure ranges 7 bar, model to 70bar
    • SPST reed switch 20VA, 240VAC, NO/NC selectable
    • 1/8” NPT or BSPT (R1/8") threaded
    • Typical stock units include: 01750, 01755 & 79990
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  • LS-1750 + LS-1755 - datasheet (PDF)
  • Gems Sensors - Reed switch protection (PDF)
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    Gems Sensors LS-1700 top / bottom mount, small size float switches

    • Stocked models include: 01701, 01702 & 011-1700
    Back to top
  • LS-1700 - datasheet (PDF)
  • Gems Sensors - Reed switch protection (PDF)
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    Gems Sensors LS-1800 + LS-1900 alloy float switches for top mounting

    • Brass & 316 Stainless Steel with Buna N/Teflon floats
    • Use on liquids with Specific Gravities as low as 0.55
    • Temperatures fluid dependent
    • Pressure ranges to 10 & 20 bar
    • SPST reed switch 20VA & 100VA, 240VAC, NO/NC
    • 1/8” & 1/4” NPT mounting
    • Typical stock units include: 
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  • Large Size Alloys (PDF)
  • Gems Sensors - Reed switch protection (PDF)
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    Gems Sensors LS-1950 + LS-1950E large size, stainless steel, high pressure float switch

    • Single point float switch for heavy duty applications
    • Materials: 316 stainless steel
    • Temperature: -40 » 149°C (optional model up to to 249°C)
    • Pressure: LS-1950: 51bar, LS-1950E: 30bar
    • Specific gravity: >0.75
    • Switch: choice of outputs available, refer datasheets
      • SPST (relay) reed switch: 20VA or 100VA - swappable NO / NC
      • SPDT (relay) reed switch: 20VA (LS-1950E)
    • Process connection: G¼” or ¼" NPT threaded
    • Typical stock units include: 011-1950, 01950, 26717 & 79999
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  • LS-1950 - datasheet (PDF)
  • LS-1950E - datasheet (Gems UK) (PDF)
  • LS-1700, LS-1750, LS-1800, LS-1850, LS-1900, LS-1950 - manual (Bulletin 72947, Rev.Y) (PDF)
  • Gems Sensors - Reed switch protection (PDF)
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    Gems Sensors LS-800-5 single point bottle switch

    • When a Switch Won’t Fit In the Tank, Use a Non-Intrusive Bottle Type
    • Wetted parts: 316SS, brass, Buna-N, Viton, copper or AL
    • Stocked units: 172635
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  • LS-800-5 series - manual (PDF)
  • Gems Sensors LS-800-5 - datasheet (PDF)
  • Gems Sensors - Reed switch protection (PDF)
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    Gems Sensors LS-2050 / LS-2050E + LS-52100 / LS-52100E large stainless steel & alloy float switches

    • Heavy duty applications with ½ & ¾” switching differentials
    • Materials: alternatives available include brass, 316SS & Buna N (float only)
    • Temperature: -40 » 148°C
    • Fluid: S.G. > 0.8
    • Pressure: 10, 34 & 62 bar (model dependent)
    • Output: SPST reed switch (20VA or 100VA)
        • NO/NC selectable
        • Very low current with 240Vac
    • Process connection: 1" NPT or R1" (BSPT) male thread
    • Electrical connection:  24" flying leads - NOT IP65 (weatherproof)
    • Optional aluminium or 316SS junction box (IP65) with pre-wired terminal strip
      • 240Vac version available with lock-out screw
    • Typical stock units include: 010-3462, 010-3463, 30288 & 52100
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  • LS-2050 + LS-52100 (Gems US) - datasheet (PDF)
  • LS-52100E (Gems UK) - datasheet (PDF)
  • LS-2050E (Gems UK) - datasheet (PDF)
  • CCPL junction box alternatives (v6) (PDF)
  • Gems Sensors - Reed switch protection (PDF)
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    Gems Sensors LS-10 interstitial level switch

    • Valox (R) housing, polyethylene float
    • Senses presence of fluid in double wall tanks, pipes
    • Temperature ranges -40 to 80°C
    • Pressure atmospheric
    • Fluids sensed; hydrocarbons or water
    • SPST reed switch 10W, 50-120VDC Resistive only
    • 16mm depth, 38mm wide
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  • LS-10 specs (PDF)
  • Gems Sensors - Reed switch protection (PDF)
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    Gems Sensors LS-3 special - 76707 low activation point float switch

    • Compact, durable 76707 float type level switch for OEM & low cost applications
      • Low float centre of gravity ensures switching very close (~16mm) to the end of float shaft
    • Mounting: top or bottom mounted (vertical) - range of thread types available
    • Wetted materials: polysulfone, Buna-N & epoxy
    • Output: SPST, N.C. dry reed switch, 20VA
    • S.G.: may be used on water, some oils & chemicals
    • Temperature: -40 » 82°C
    • Pressure: from 3 bar (50PSIg)
    • Electrical connection: 72" PVC flying leads, not IP65 (i.e. not weatherproof without additional protection)
    • Other LS-3 models available ex. stock
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  • LS-3 special - p_n 76707 (PDF)
  • LS-3 - manual (PDF)
  • Gems Sensors - Reed switch protection (PDF)
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    Gems Sensors WIF water in fuel & lubricating oil switch

    • The rugged WIF-1250 sensor was designed with no moving parts (conductivity) to provide compact, reliable & simple detection of the presence of water in fuel.
      • Typical applications include off-highway vehicles, heavy machinery, diesel storage tanks and generator sets.  It can also be a useful addition to fuel filters and lubricating oil tanks to sense lubricant property degradation.
      • Alternating (±DC sqaure wave) potential prevents typical metal probe material loss through electrolysis
    • Suitable OEM applications with customisation available on request
    • Process conditions: -40»125°C, up to 750PSI (@21°C)
    • Materials: nickel plated steel, electrolytic nickel plated & fused glass
    • Insertion length: approx. 5mm
    • Sensitivity: 10kΩ
    • Slosh dampening: 5secs delay
    • Supply: 8»32Vdc
    • Output: open collector (sinking output) on wet or dry
    • Electrical connection: 380mm cable (15")
    • Mounting: in any position, threaded
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  • WIF-1250 - water in fuel sensor (PDF)
  • WIF-1250 - water in fuel sensor operating principle (PDF)
  • WIF-1250 - manual (PDF)
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    Gems Sensors ULS-1

    • Compact, ultrasonic point level switch
    • No moving parts for long service life, rugged usage
    • Wetted parts: 316SS
    • Process conditions: 80°C
    • Outputs: SPST relay and transistor (wet sink or source) models available
      • Delay: 0.5sec
    • Mounting: ¼" & ½" NPT thread models
    • Supply: 5»30Vdc
    • Electrical connection: weatherproof (IP65) with 12" (300mm) PVC cables
    • Some models available ex. stock including 220903, 221485 & 221486.
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  • ULS-1 - (PDF)
  • ULS-1 & ULS-11 - man (PDF)
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    Gems Sensors ELS-1100 Electro-Optic General Purpose Liquid Level Sensor Sensor

    • Polysulfone or Nylon wetted parts
    • General purpose applications
    • Temperature ranges –18 » 80°C
    • Pressure range 10 bar
    • TTL/CMOS compatible( open collector output )
    • ¼” NPT threaded
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  • ELS-1100 specs (PDF)
  • ELS-1100HT specs (PDF)
  • Gems Electro-Optic level switches (complete) (PDF)
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    Gems Sensors ELS-1100TFE Electro-Optic Ultra-Pure Liquid Level Sensor

    • Teflon wetted parts
    • High purity or chemically aggressive applications
    • Temperature ranges –18 to 80°C
    • Pressure range 10 bar
    • TTL/CMOS compatible( open collector output )
    • 1/4” NPT threaded
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  • ELS-1100TFE specs (PDF)
  • Gems Electro-Optic level switches (complete) (PDF)
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    Gems Sensors ELS-1150 Electro-Optic Compact Liquid Level Sensor

    • Compact level switch with no moving parts
      • Ideal for monitoring the small, pressurized vessels found in HVAC, refrigeration and hydraulic applications
    • Upgraded with micro-processor board to provide a wide range of new OEM opportunities!
      • e.g. electrical termination, output time delay etc
    • Materials: nickel-plated carbon steel or stainless steel (model dependent), fused glass
    • Pressure: up to 2500Psig
    • Temperature: -40 » 100°C
      • High temperature versions are also available
    • Output: transistor (open collector) - wet or dry sink
      • Refer also optional Opto-Pak Controller (link) for relay output
      • Ex approved (FM Certified) versions also available
    • Supply: 5 & 12Vdc models
    • Process connections: choice of ½” NPT or ¾"-16 straight thread
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  • ELS-1150 - metallic (PDF)
  • ELS-1150XP (PDF)
  • Electro-optic Operating Principle (JPG)
  • ELS-1150XP - instructions (Bulletin 227507) (PDF)
  • ELS-1150 - instructions (Bulletin 196361, Rev.B) (PDF)
  •  

    Gems Sensors ELS-1200 Electro-Optic High Feature Liquid Level Sensor

    • Nickel plated carbon steel, Stainless & Hasteloy C versions
    • High pressure rated and corrosion resistant
    • Temperature ranges –40 to 100°C
    • Pressure range 172 bar
    • TTL/CMOS compatible( open collector output )
    • 1/2” & 3/4” NPT threaded
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  • ELS-1200 specs (PDF)
  • ELS-1200RE (PDF)
  • Gems Electro-Optic level switches (complete) (PDF)
  •  

    Gems Sensors ULS-1 mini-ultrasonic level switch

    • Compact, rugged level switch with no moving parts
    • Materials: 316SS
    • Process connections: ¼ & ½" NPTM threads (external mounting)
    • Supply: 5»30Vdc
    • Output: relay or transistor output (wet sink or wet source)
      • Delay: 0.5secs to prevent switch chatter with turbulent media
    • Electrical connection: IP65
    • Temperature: up to 80°C
    • Stocked models: 220903, 221486
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  • Gems Sensors - ULS-1 (PDF)
  • ULS-1 & ULS-11 - instructions (160820, rev.E) (PDF)
  •  

    Gems Sensors XLS-1 ultrasonic level switch

    • Compact, rugged level switch with no moving parts
      • Ideal for generators, water tanks, radiators, printers, off-road vehicles & other industrial equipment
    • Materials: 316L SS
    • Process connections: ¼" NPT, ½" NPT, M12x1.0, M12x1.5, ½"-20 or G¼
      • OEM option available
    • Supply: 5»28Vdc
    • Output: open collector - sinking or sourcing switch
    • Electrical connection: IP67, IP6K9K (wetted sensor parts only)
    • Temperature: -40 » 125°C media (ambient up to 85°C)
    • Pressure: up to 250PSIg
    • Fluid compatibility:water, water-based media, hydrocarbon-based chemicals
      • NOT for use with high viscosity liquids (>200cSt)
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  • XLS-1 - ultrasonic level switch (PDF)
  • Gems Sensors XLS-1 - manual (PDF)
  •  

    Gems Sensors ULS-11 ultrasonic level switch

    • Rugged, self contained for level switch with no moving part for robust applications
    • 316 stainless steel wetted parts
    • Process connection: ¾" NPTM threaded
    • Supply: 9»36Vdc
    • Temperature: –29 » 71°C
    • Pressure: up to 69 bar
    • Output: relay NO, NC or SPDT (model dependent)
      • Delay: 0.5secs
    • Ingress protection: NEMA 4 (IP65) / NEMA 7 enclosures
    • Stocked models: 175387 (NO), 226378 (NC)
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  • ULS-11 specs (PDF)
  • Ultrasonics brochure (PDF)
  • ULS-11 - SPDT (Bulletin 160820 rev.D) (PDF)
  • ULS-11 (SPST) + ULS-20 (Bulletin 160820, rev.C) (PDF)
  •  

    Gems Sensors ULS-50 ultrasonic level switch

    • Polypropylene or PFA Teflon(R) wetted parts
    • General purpose or submersible applications
    • Temperature ranges –40 to 90°C
    • Pressure range 10 bar @ 25°C
    • 1Amp SPDT Relay output
    • NEMA 6 ( IP68 ) enclosure
    • ¾” NPT threaded
    • Stocked model: 195052
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  • ULS-50 specs (PDF)
  • Ultrasonics brochure (PDF)
  • Ultrasonics Overview (PDF)
  •  

    Gems Sensors XT-1000 magnetostrictive level sensor

    • Float type level transmitter for high accuracy level sensing
    • Specific models for mobile / heavy vehicle applications with high vibrations
      • We can provide locally made custom mountings (e.g. bottles)
    • Lengths: 200 » 6,000mm
    • Liquid S.G.: >0.4
    • Process connections: compression fittings & most common threads (G, R & NPT) / flanges including tri-clamp
    • Accuracy: ±0.2mm
    • Resolution: 0.1mm (visible steps in output)
    • Output: 4-20mA (2 wire) spannable (optional HART)
    • Enclosure: IP68
    • Supply: 10»30Vdc
    • Temperature: -40 » 125°C (others on demand)
    • Pressure: 0 » 120bar @ 21°C (others on demand)
    • Wetted materials: 316SS & others (e.g. Hastelloy C)
    • Hazardous areas: IECEx Ex ia
    • Available with material certificates on request.

     

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  • XT-1000 magnetostrictive level sensor - datasheet (PDF)
  • XT-1000 - manual (PDF)
  • XT-1000 magnetostrictive level - operating principle (JPG)
  •  

    Gems Sensors XT-300 & XM-300 continuous level sensors

    • Float type level transmitter for continuous level sensing.
      • Designed for OEMs with a high degre of customisation possible!
    • Wetted parts from a choice of engineered plastics for chemical compatibility.
    • Small size for continuous output in shallow tanks.
    • Lengths: up to 355mm of indication length (500mm stem)
    • Liquid S.G.: >0.45 (choice of floats)
    • Process connections: choice of flanges, compression fittings & common threads (NPT, G, Metric)
    • Resolution: 4mm
    • Output: XT-300 4-20mA (2 wire); XM-300 proportional voltage (V) or resistive (Ω)
    • Enclosure: choice of cable, junction box or DIN plug
    • Temperature: -40 » 121°C (dependent on material choice)
    • Pressure: up to 17bar (dependent on material choice)
    • Wetted materials: Buna-N, Noryl, polysulfone, polypropylene or PVDF
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  • XM-300 + XT-300 - datasheet (PDF)
  •  

    Gems Sensors UCL-510 ultrasonic level transmitter

    • Continuous level transmitter with four independent, adjustable level switches built-in
      • Optional pump control feature
    • Range: 1.25m
    • Deadband: 50mm
    • Accuracy: 3mm
    • Resolution: 0.5mm
    • Supply: 24Vdc
    • Output: continuous 4-20mA analogue & 4 x SPST relays
      • Choice of fail safe for analogue & switch outputs
    • Wetted materials: PVDF
    • Temp: -7 » 60°C
    • Press: 30PSIg
    • Enclosure: NEMA 6P / IP68 (PC / ABS)
    • Electrical connection: 1.2m cable (PU)
      • Programming via supplied GUI software with USB dongle
    • Process connection: 1" NPT
    • Currently ex. stock (p/n: 225100) including nylon mounting flange & 316SS mounting bracket
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  • UCL-510 - datasheet (PDF)
  • UCL-510 with CCPL mounting bracket (PDF)
  • Gems Sensors - UCL-510 software (WARNING executable file which may be blocked) (EXE)
  • UCL-510 - configuration software (help file) (PDF)
  •  

    Gems Sensors UCL-210 continuous ultrasonic level transmitter

    • Range: 1.8m (6')
    • Deadband: 90mm
    • Accuracy: ±0.25% of span
    • Resolution: ~3mm
    • Wetted materials: PP, PVDF
    • Temp: -40 » 60°C
    • Press: 30PSIg
    • Supply: 12»36Vdc
    • Output: 4-20mA, 2 wire
    • Electrical connection: ½" NPT cable gland entry
    • Enclosure: NEMA 4X, IP65
    • Process connection: ¾" NPT
    • Currently ex. stock (p/n: 201010)
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  • UCL-210 - datasheet (PDF)
  • Ultrasonics brochure (PDF)
  •  

    Gems Sensors UCL-200 continuous ultrasonic level transmitter

    • Continuous level transmitter with an independent, adjustable level switch built-in
    • Range: 7.3m (24ft)
    • Deadband: 150mm
    • Accuracy: ±0.25% of span
    • Resolution: ~3mm
    • Wetted materials: PP, PVDF
    • Temp: -40 » 60°C
    • Press: 30PSIg
    • Supply: 14»36Vdc
    • Output: 4-20mA & SPDT relay
    • Electrical connection: ½" NPT cable gland entry
    • Enclosure: NEMA 4X, IP65
    • Process connection: 2" NPT
    • Currently ex. stock (p/n: 201002)

     

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  • UCL-200 - datasheet. (PDF)
  • Ultrasonics brochure (PDF)
  •  

    Pressure Transmitters & Transducers

    • Excellent Repeatability & Reliability
    • Pressure ranges Vacuum to 690 bar
    • Chemical Vapour Deposition technology for accuracy
    • Modular design reduces costs and delivery times
    • OEM types, high temperature and specialty designs
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  • Pressure Transducers Technology (PDF)
  • Transmitters Technology (PDF)
  • Gems CVD Psibar brochure (PDF)
  •  

    Pressure Transducers – Sanitary 3-A 890 Series

    • 69 mbar to 69 bar ( 1 to 1000 psig )
    • Accuracy 0.2% FS
    • Thermal Error 0.036% FS/0C
    • Operating Temperatures –40°C to 125°C
    • Sensor Technology : Capacitance
    • Output 4-20mA ( 2 wire )
    • Proof Pressure refer Specs
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  • 890 Specs (PDF)
  • 890 Instructions (PDF)
  •  

    Pressure Transducers – Immersible Types

    • Immersible to 200 metres ( 650’ )
    • Millivolt and Current outputs
    • All welded stainless steel construction
    • Hastelloy C or Inconel for seawater applications
    • Factory Set or Customer adjustable ranges
    • Various sensor technologies
    • NOTE: the 2400 series borehole sensor is unfortunately no longer available
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  • 2600 Immersible Specs (PDF)
  • 4000K Immersible High Performance Specs (PDF)
  • 4000L Immersible High Performance Specs (PDF)
  • 4700 High Stability Specs (PDF)
  • 5000 Low Pressure Specs (PDF)
  • 6600 Immersible Specs (PDF)
  • GCL Submersible Specs (PDF)
  •  

    Gems Sensors 3100 heavy duty, compact OEM pressure transducer

    • Consistent high levels of performance, reliability & stability from sputtered thin film (strain gauge) technology
      • 3200 Series transmitters feature thicker diaphragms & a pressure restrictor to withstand the rigors of cavitations or extreme pressure
    • Available as:
      • gauge, absolute, sealed pressure models
      • ratiometric, voltage (V) or current (mA) output
      • range of electrical connections including DIN plug, Deutsch, Packard MetriPack, M12, NPT conduit & molded cable
    • Pressure ranges: 0» 25,000PSI (1,600bar)
    • Proof pressure: up to 3x full scale
    • Design life: >100 million FS cycles
    • Performance:
      • Long term drift: 0.2% FS/year (non-cumulative)
      • Accuracy: 0.25% FS typical
      • Thermal error: 1.5% FS/100°C
    • Operating temperature: -40 » 125°C (depending on model)
    • Response time: 1msecs
    • Wetted parts: 17-4 PH stainless steel
    • Process connection: NPT, SAE, M12, submersible & BSP (G or R type)
    • Wide range of 4-20mA, G¼" (BSPP), DIN plug units in stock
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  • Gems Sensors (UK) 3100 Series - datasheet (PDF)
  • Gems Sensors (US) 3100 + 3200 Series datasheet (PDF)
  • 3100 + 3200 - instructions (223408, Rev.B, CCPL) (PDF)
  •  

    Gems Sensors 2200 general purpose pressure transducer

    • High stability, Psibar chemical vapour deposition (CVD, strain gauge) technology
    • Available as:
      • gauge, absolute, vacuum & compound pressure models
      • millivolt (mV), voltage (V) or current (mA) output
      • range of electrical connections including DIN plug, molded cable & submersible
    • Pressure ranges: vacuum » 6,000PSI (400 bar)
    • Proof pressure: 2x full scale (1.5x FS for >5,000PSI
    • Design life: >100 million FS cycles
    • Performance:
      • Long term drift: 0.2% FS/year (non-cumulative)
      • Accuracy: 0.25% FS typical (optional 0.15% FS)
      • Thermal error: 1.5% FS typical (optional 1% FS)
    • Operating temperature: -40 » 125°C (depending on model)
    • Response time: 0.5msecs
    • Wetted parts: 17-4 PH stainless steel
    • Process connection: NPT, SAE, submersible & BSP (G or R type)
    • Wide range of 4-20mA, G¼" (BSPP), DIN plug units in stock
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  • 2200 + 2600 series - pressure transducer datasheet (PDF)
  • 2200 + 2600 - manual (PDF)
  •  

    Gems Sensors 3500 low pressure, compact OEM pressure transducer

    • Great for OEMs that require high levels of performance, reliability & stability from a very compact pressure transducer
      • The MMS sensor technology of the 3500 series very quickly reaches full accuracy at power-up making the device a great choice for remote, battery powered applications where power draw & oepration time must be minimised
    • Available as:
      • gauge, absolute or compund (vacuum » positive pressure) gauge pressure models
      • ratiometric, voltage (V) or current (mA) output
      • range of electrical connections including DIN plug, Deutsch, Packard MetriPack & M12
    • Pressure ranges: vacuum » 40bar (~600PSI)
    • Proof pressure: up to 2x full scale
    • Design life: >100 million cycles
    • Performance:
      • Long term drift: 0.2% FS/year
      • Accuracy: 0.25% FS typical
      • Thermal error: ±1% / 80°C
    • Operating temperature: -40 » 125°C 
    • Response time: TBA
    • Wetted parts: 316L stainless steel
    • Process connection: NPT, SAE, UNF, M12, & BSP (G type)
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  • Gems Sensors 3500 - datasheet (PDF)
  • 3500 series - manual (PDF)
  •  

    Gems Sensors FT-110 (TurboFlow) OEM turbine flow sensor

    • OEM style turbine flow meter for measuring low flow rates in clean liquids
    • Materials: Nylon 12, PTFE, graphite
    • Media:
      • Flow range: 0.5 » 35L/min (0.13 » 9.2GPM)
      • Viscosity: 0.8 » 16cSt (32 » 81SSU)
      • Filtration: < 50 microns
      • Temperature: -20 » 100°C
      • Pressure: < 200PSIg (13.7bar)
    • Output: frequency (Hz) - NPN sinking open collector
      • NOTE: 1 » 2.2kΩ pull-up resistor required - not supplied
    • Process connections: 17mm tube o-ring, 3/8“ NPT or G3/8" (BSPP) fitting
    • Power: 5»24Vdc
    • Electrical connections: spade terminals, 1m cable or DIN plug (optional p/n 218572 for DIN plug with integral pull-up resistor)
    • Some models stocked
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  • Gems Sensors FT-110 - TurboFlow flow sensor (PDF)
  • Gems Sensors FT-110E - TurboFlow flow sensor (PDF)
  • FT-110 instructions (173926, rev.F) (PDF)
  •  

    Gems Sensors PS41 miniature pressure switch

    • Small OEM style pressure switch
    • Adjustable (off-line) range:
      • 4 » 100PSIg (0.28 » 7bar)
    • Choice of pressure port (BSPP & NPT), wetted materials, electrical termination, diaphragm & other customisations
    • Outputs: SPST (N.O or N.C) or SPDT
    • Stocked models available (G¼" external thread, DIN 43650A plug)
    • Factory setting available with test reports
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  • PS41 - miniature pressure switch (4»100PSIg, 0.28»7bar) (PDF)
  • Gems Pressure switches - old vs new part numbers (PDF)
  • Adjustable Pressure Switches - instructions (208687, Rev.B, CCPL) (PDF)
  • Gems pressure switch (PSxx) body stampings (JPG)
  •  

    Gems Sensors PS75 rugged mini pressure switch

    • Rugged OEM style pressure switch with wear disc & cushioning ring for increased life expectancy
    • Adjustable (off-line) range:
      • 5 » 6,000PSIg (0.35 » 414bar)
    • Choice of pressure port (BSPP & NPT), wetted materials, electrical termination, diaphragm & other customisations
    • Outputs: SPST (N.O or N.C) or SPDT
    • Stocked models available (G¼" external thread, DIN 43650A plug)
    • Factory setting available with test reports
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  • PS75 - rugged mini pressure switch (5»6000PSIg, 0.35»414bar) (PDF)
  • Gems Pressure switches - old vs new part numbers (PDF)
  • Adjustable Pressure Switches - instructions (208687, Rev.B, CCPL) (PDF)
  • Gems pressure switch (PSxx) body stampings (JPG)
  •  

    Gems Sensors PS71 general purpose mini pressure switch

    • OEM style pressure switch
    • Adjustable (off-line) range:
      • 10 » 5,000PSIg (0.7 » 344bar)
    • Choice of pressure port (BSPP & NPT), wetted materials, electrical termination, diaphragm & other customisations
    • Outputs: SPST (N.O or N.C) or SPDT
    • Stocked models available (G¼" external thread, DIN 43650A plug)
    • Factory setting available with test reports
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  • PS71 - mini pressure switch (100»5000PSIg, 0.7»344bar) (PDF)
  • Gems Pressure switches - old vs new part numbers (PDF)
  • Adjustable Pressure Switches - instructions (208687, Rev.B, CCPL) (PDF)
  • Gems pressure switch (PSxx) body stampings (JPG)
  •  

    Gems Sensors PS61 subminiature pressure switch

    • Very small OEM style pressure switch for hydraulic applications
    • Adjustable (off-line) range:
      • 10 » 4,350PSIg (0.7 » 300bar)
    • Choice of pressure port (BSPP & NPT), wetted materials, electrical termination, diaphragm & other customisations
    • Outputs: SPST (N.O or N.C)
    • Stocked models available
    • Factory setting available with test reports
    • Replaces the legacy PS61, PS61P, PS52 & PS32 product families.
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  • PS61 - subminiature pressure switch (10»4,350PSIg, 0.7»300bar) (PDF)
  • Gems Pressure switches - old vs new part numbers (PDF)
  • Adjustable Pressure Switches - instructions (208687, Rev.B, CCPL) (PDF)
  • Gems pressure switch (PSxx) body stampings (JPG)
  •  

    Warrick general purpose plug-in conductive sensors

    • Manufactured by Gems Sensors & Controls (USA)
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  • Warrick - general purpose plug-in modules (PDF)
  • Warrick conductivity level controls - complete (PDF)
  •  

    Warrick conductive sensor fittings & probes

    • Manufactured by Gems Sensors & Controls (USA)
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  • Warrick - sensor fittings & probes (PDF)
  • Warrick conductivity level controls - complete (PDF)
  •  

    Gems Sensors Flip-Pak solid state latching circuit

    • Solid state latching circuit
    • Provides a latching circuit for pump control between two level switches
    • Output: 1 x SPST (N.O) relay (5A)
    • Supply: mains AC
    • Not weatherproof
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  • Flip-Pak - solid state latching circuit (PDF)
  • Flip-Pak - operating manual (PDF)
  •  

    Gems Sensors Opto-Pak controller for transistor type switches

    • Extend the power & switching capabilities of 10»28Vdc electro-optic switches
    • Supply: 115 and 220Vac models
    • Output: SPDT (5A) relay
    • Enclosure: open board & IP65 enclosure models
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  • Opto-Pak controller (PDF)
  • Opto-Pak - Gems UK (PDF)
  • Opto-Pak Controller - instructions (Bulletin 121574, Rev.G) (PDF)
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    Gems Sensors DM21 Rate Meter / Totaliser

    • 8 Digit LCD
    • Accepts pulse inputs from flow sensors
    • Rate & total displayed
    • Programmable features:
      • Update time, minimum number of pulses, and forced zero time
      • Programmable colour change display based on an event (red / green)
    • 90-264Vac or 20-50VAC/DC Supply
    • 9-15VDC powers RFO or FT-110 flow sensors
    • Optional linear analog output relative to rate
    • Standard outputs: two NPN transistors and one relay (2nd relay optional)
    • CE Approved
    • Standard 1/8 DIN size (92 mm x 45mm cutout)
    • Include output 1 & 2 status annunciators
    • Learn how to program here on YouTube
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  • DM21 - datasheet (PDF)
  • DM21 - manual (PDF)
  •  

    Gems Sensors M103 Compact Rate Meter / Totaliser

    • Easy to read 8-digit supertwist LCD (4-digit, with legend for rate) with backlighting capability
    • Simple menu driven setup
    • NEMA 4x rated front panel for use in washdown environments
    • Independent scale factors for total, rate and pulsed output
    • 3V lithium battery (1 or 2) provides long life and eliminates the need for external power
      • NOTE: For backlighting or powering the output also order the M103 Power supply
    • Accepts pulse inputs from flow sensors
    • Rate & total displayed
    • Powers light & RFO or FT-110 sensors
    • Learn how to program here on YouTube
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  • M103 - datasheet (PDF)
  • M103 - manual (PDF)
  •  

    Gems Sensors LS-800 & LS-800E multi-point level switch

    • Rugged metallic units ideal for larger tanks up to 3.4m (11 feet) or more.
      • Models available with marine agency approvals, suitable for Navy applications
    • As with all Gems products, these are highly customisable to suit OEM requirements
      • Includes length, fitting, number of switch points, wetted materials & the inclusion of temperature sensors.
    • Wetted materials: brass, 316SS or Buna-N - others possible on request
    • Mounting: flange or threaded (NPT or G type BSPP for LS-800E)
    • Output:
      • Level: SPST (20 / 100VA) or SPDT (20VA) reed switches
        • Up to 6 switch actuation points / levels
      • Temperature: thermistor RTD (TM-800 models) or thermostat (TH-800 models)
    • S.G.: choice of floats for specific gravities >0.55
    • Temperature: from 82 » 149°C - depending on materials
    • Pressure: up to 750PSI (51 bar) - depending on materials
    • Length: up to 3.4m or more
    • Electrical connection: cables, lead wires or junction boxes
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  • Gems Sensors LS-800 - datasheet (PDF)
  • LS-800E (PDF)
  • LS-800 series - manual (PDF)
  • Gems Sensors - Reed switch protection (PDF)
  •  

    Gems Sensors LS-800PVC & LS-800E-PVC multi-point level switch

    • Rugged plastic units ideal for chemical storage or potable water tanks.
      • Models available with NSF Approval
    • As with all Gems products, these are highly customisable to suit OEM requirements
      • Includes length, fitting & number of switch points
    • Wetted materials: Buna-N or all PVC-U engineered plastic
    • Mounting: flange or threaded
    • Output: SPST (20 / 100VA) or SPDT (20VA) reed switches
      • Up to 7 switch actuation points / levels
    • S.G.: choice of floats for specific gravities >0.8
    • Temperature: up to 51°C
    • Pressure: atmospheric - not recommended for pressurised applicaitons
    • Length: up to 1.5m (60") - longer on special request
    • Electrical connection: cables, lead wires or junction boxes
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  • Gems Sensors LS-800PVC - datasheet (PDF)
  • LS-800E-PVC (PDF)
  • LS-800 series - manual (PDF)
  • Gems Sensors - Reed switch protection (PDF)
  •  

    Gems Sensors LS-700 multi-point level switch

    • Compact, rugged metallic units ideal for tanks less than 1.2m (4 feet).
    • As with all Gems products, these are highly customisable to suit OEM requirements
      • Includes length, fitting, number of switch points, wetted materials & the inclusion of temperature sensors.
    • Wetted materials: brass, 316SS, Buna-N, PTFE or polypropylene (PP) - others possible on request
    • Mounting: flange or threaded
    • Output:
      • Level: SPST reed switch with a choice of ratings (20 / 100VA)
        • Up to 5 switch actuation points / levels
      • Temperature: thermistor RTD (TM-700 models) or thermostat (TH-700 models)
    • S.G.: choice of floats for specific gravities >0.45
    • Temperature: from 82 » 149°C - depending on materials
    • Pressure: up to 1000PSI (68 bar) - depending on materials
    • Length: up to 1.2m
    • Electrical connection: cables, lead wires or junction boxes
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  • Gems Sensors LS-700 - datasheet (PDF)
  • LS-700 + LS-700-EP series - manual (PDF)
  • Gems Sensors - Reed switch protection (PDF)
  •  

    Gems Sensors LS-350 multi-point level switch with built-in siphon / fill tube

    • Great for automated medical, chemical dosing or sampling equipment the custom built LS-350 multi-point level switch saves space and cost by including both level sensing & fluid removal / addition capacity via a single opening in a fluid container
      • Perfect for re-use in replacement containers without the need for re-wiring or time consuming re-installation / calibration
    • As with all Gems products, these are highly customisable to suit OEM requirements
      • Includes length, fitting, hose barb, number of switch points & wetted materials
      • Even available with safety switch output to ensure correct installation (safety latching of equipment) to avoid spills
    • Wetted materials: Buna-N, Noryl or polysulfone (PSU) - others possible on request
    • Mounting: flange or plug (top or bottom mounted)
    • Output: SPST reed switch with a choice of ratings
      • Up to 6 switch actuation points / levels
    • S.G.: choice of floats for specific gravities >0.75
    • Temperature: 99°C or more (depending on materials)
    • Pressure: atmospheric - not recommended for pressurised applicaitons
    • Length: up to 380mm standard, longer on request
    • Fluid barb: compatible with 3/16" I.D. hose (standard)
    • Electrical connection: cables or lead wires
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  • Gems Sensors LS-350 - datasheet (PDF)
  • Gems LS-350 - operating principle (PDF)
  • LS-350 series - manual (PDF)
  • Gems Sensors - Reed switch protection (PDF)
  •  

    Gems Sensors PS82 miniature vacuum switch

    • Small OEM style vacuum switch (built on PS41 structure)
    • Adjustable (off-line) range:
      • 5" » 28"Hg (169 » 948mbar)
    • Choice of pressure port (BSPP & NPT), wetted materials, electrical termination, diaphragm & other customisations
    • Outputs: SPST (N.O or N.C) or SPDT
    • Stocked models available (G¼" external thread, DIN 43650A plug)
    • Factory setting available with test reports
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  • PS82 - miniature vacuum switch (5»28”Hg, 169»948mbar) (PDF)
  • Gems Pressure switches - old vs new part numbers (PDF)
  • Adjustable Pressure Switches - instructions (208687, Rev.B, CCPL) (PDF)
  • Gems pressure switch (PSxx) body stampings (JPG)
  •  

    Gems Sensors PS81 ultra long-life vacuum switches

    • Small OEM style vacuum switch
    • Adjustable (off-line) range:
      • 1.5" » 15"Hg (51 » 508mbar)
    • Choice of pressure port (BSPP, SAE or NPT), wetted materials, electrical termination, diaphragm & other customisations
    • Outputs: SPST (N.O or N.C) or SPDT
    • Factory setting available with test reports
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  • PS81 - ultra long-life vacuum switch (PDF)
  • Adjustable Pressure Switches - instructions (208687, Rev.B, CCPL) (PDF)
  • Gems Pressure switches - old vs new part numbers (PDF)
  • Gems pressure switch (PSxx) body stampings (JPG)
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    Gems Sensors RFO (RotorFlow) paddle wheel flow sensor

    • Paddle wheel flow sensor for visual flow indication & analogue flow measurement
      • Hall effect sensor
    • Materials: polypropylene, brass or stainless steel body
    • Media: dependent on body type
      • -29 » 100°C (65°C ambient), up to 13bar
      • Viscosity: <200SSU
    • Process connections: ¼, ½, ¾ & 1” BSPP (G type) or NPT thread
    • Output: pulse (square wave 4.5 » 24Vdc)
      • Frequency: 15 » 225Hz
    • Supply: 4.5 » 24Vdc
    • Electrical connection: 24" cable
    • Range: dependent on port size
      • Flow: 0.38 » 76L/min (0.1 » 20GPM)
    • Typical stocked units include: 151581, 155421, 155481, 155481BSPP, 165075, 194761BSPP
        • Note: repair kits available for some models
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  • RFO - datasheet (RotorFlow flow sensor 4.5»24VDC pulse output) (PDF)
  • RFO + RFA - manual (Bulletin 157258, Rev.J) (PDF)
  • RotorFlow - complete section (PDF)
  •  

    Gems Sensors RFA (RotorFlow) paddle wheel flow sensor

    • Paddle wheel flow sensor for visual flow indication & analogue flow measurement
      • Hall effect sensor
    • Materials: polypropylene, brass or stainless steel body
    • Media: dependent on body type
      • -29 » 100°C (65°C ambient), up to 13bar
      • Viscosity: <200SSU
    • Process connections: ¼, ½, ¾ & 1” BSPP (G type) or NPT thread
    • Output: proportional voltage (0 » 10Vdc)
    • Supply: 24Vdc
    • Electrical connection: 24" cable
    • Range: dependent on port size
      • Flow: 0.38 » 76L/min (0.1 » 20GPM)
    • Typical stocked units include: 182099
        • Note: repair kits available for some models
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  • RFA - datasheet (RotorFlow flow sensor 0»10V analogue output) (PDF)
  • RFO + RFA - manual (Bulletin 157258, Rev.J) (PDF)
  • RotorFlow - complete section (PDF)
  •  

    Gems Sensors DipTape level indicators

    • Purely mechanical (magnetic) diptape for level indication
    • Custom built with OEM customisation available
    • Materials: choice of 316SS, brass, polypropylene, PVC or PVDF
    • Process connection: choice of threaded or flanged
    • Length: custom up to 1.8m
    • See how they work here - YouTube
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  • DIPTAPE - Plastic versions datasheet (PDF)
  • DIPTAPE - Alloy versions datasheet (PDF)
  • Gems Diptape - operating principle (PDF)
  • DipTape - manual (PDF)
  •  

    Gems Sensors RFS (RotorFlow) paddle wheel flow switch

    • Paddle wheel flow switch for visual flow indication & flow alarm
      • Hall effect sensor
    • Materials: polypropylene, brass or stainless steel body
    • Media: dependent on body type
      • -29 » 100°C (65°C ambient), up to 13bar
      • Viscosity: <200SSU
    • Process connections: ¼, ½, ¾ & 1” BSPP (G type) or NPT thread
    • Output: SPDT, relay
    • Supply: 24Vdc or 115vac
    • Electrical connection: 24" cable
    • Range: dependent on port size
      • Flow: 0.38 » 76L/min (0.1 » 20GPM)
    • Typical stocked units include: 155425, 155485BSPP, 181688
      • Note: repair kits available for some models
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  • RFS - datasheet (RotorFlow flow switch) (PDF)
  • RFS - manual (Bulletin 157261, Rev.G) (PDF)
  • RotorFlow - complete section (PDF)
  •  

    Gems Sensors M Series solenoid valves

    • The M Series implements efficient power conservation in a solenoid valve that is specifically designed for sub-miniature two- and three-way performance requirements.

    • In battery-powered applications, the M Series can be designed for extreme low wattage conditions.

    • With a compact size, consistent high-speed response time, and reliable operation over 200 million cycles, the M Series delivers extended performance and precision flow control in a small lightweight environment.

    • Typical applications:

      • Medical and Therapeutic Healthcare 
      • Clinical Chemistry and Analysis Equipment 
      • Drop-on-Demand Printing 
      • Environmental Instrumentation
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  • Gems Solenoid Valves - Overview & Selection (PDF)
  • Gems Sensors - M Series solenoid valve datasheet (PDF)
  •  

    Gems Sensors D Series solenoid valves

    • For maximum flow in a miniature solenoid valve the D Series valves deliver a wide range of Cvalues and maximum operating pressures.
    • The D Series is also available in multiple body materials, seal materials, coil constructions, voltages, and wattages.
    • Proven to perform for millions of cycles without failure, the D valve - as with the entire valve series - is ideal for manifold configurations, sub-assemblies, and complete fluidic systems.
    • The D Series is the largest in a progression of the highly flexible, modular design, (general purpose) valves.
    • Typical applications: 

      • Agriculture 
      • Defense 
      • Sterilization Equipment 
      • Industrial Automation
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  • Gems Sensors - D Series solenoid valve datasheet (PDF)
  • Gems Solenoid Valves - Overview & Selection (PDF)
  •  

    Gems Sensors D-Cryo solenoid valves

    • The D-Cryo Series is a 2-way, high flow, miniature Cryogenic solenoid valve designed and built for service down to -196°C
    • Depending on your temperature requirements, the D-Cryo Series can be configured for liquid nitrogen (LN2), liquid carbon dioxide (LC02), and other extreme temperature media.
    • PTFE coated plungers, 316 stainless steel guide tubes and plunger springs, encapsulated coils and PTFE or Rulon® seat seals produce a truly robust cryogenic valve for applications requiring high cycle life and media temperature control.
    • Typical applications:

      • Environmental Chambers 
      • Food Processing 
      • Laser Surgical Equipment 
      • Semiconductor Manufacturing
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  • Gems Sensors - D-Cryo solenoid valve datasheet (PDF)
  • Solenoid Valves - Overview & Selection (2014) (PDF)
  •  

    Gems Sensors B-Cryo solenoid valves

    • The B-Cryo Series is a 2-way miniature Cryogenic solenoid valve designed and built for service down to -196°C in applications needing a CV 0.045 » 0.440.
    • Depending on your temperature requirements, the B-Cryo Series can be configured for liquid nitrogen (LN2), liquid carbon dioxide (LCO2), and other extreme temperature media.
    • PTFE coated plungers, 316 stainless steel guide tubes and plunger springs, encapsulated coils and PTFE or Rulon seat seals produce a truly robust cryogenic valve for applications requiring high cycle life and media temperature control.
    • Typical applications:  

      • Environmental Chambers 
      • Food Processing 
      • Laser Surgical Equipment 
      • Semiconductor Manufacturing
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  • Gems Sensors - B-Cryo solenoid valve datasheet (PDF)
  • Gems Solenoid Valves - Overview & Selection (PDF)
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    Gems Sensors & Controls CAP-100, non-contact, capacitive level switch

    • Non-contact level switch designed for monitoring liquid level through plastic / glass / fibreglass containers.
      • e.g. containers of waste, reagent or diluent liquid
    • Great for nasty chemicals or tanks which don't allow for easy mounting of contact switches (e.g. float switches).
      • Works well with dark, sticky and viscous liquids difficult to sense in other ways
    • Temperature: -25 » 70°C
    • Supply: 5»48Vdc
      • Protection: transient, short circuit, reverse polarity & overload
    • Enclosure: weatherproof (IP67, NEMA 1»13)
    • Mounting: simple wall mount
    • Sensing range: gap between sensor surface & liquid including wall thickness of container
    • Output: switch (transistor) - either wet or dry sink for water based or non-conductive liquids
      • LED: power & switch
    • Setting: adjustable sensitivity for on-site calibration to media
    • Stocked models include: 228830, 230079 & 230081
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  • Gems Sensors CAP-100 - datasheet (PDF)
  • CAP-100 - manual (PDF)
  •  

    Gems Sensors & Controls CAP-150, non-contact, capacitive level switch

    • Non-contact level switch designed for monitoring liquid level through plastic / glass / fibreglass containers.
      • e.g. containers of waste, reagent or diluent liquid
    • Mount to sight glass with custom clamp (p/n 240836) for level switching
    • Great for nasty chemicals or tanks which don't allow for easy mounting of contact switches (e.g. float switches).
      • Works well with dark, sticky and viscous liquids difficult to sense in other ways
    • Temperature: -25 » 70°C
    • Supply: 5»48Vdc
      • Protection: short circuit & reverse polarity
    • Enclosure: weatherproof (IP67, NEMA 1»13)
    • Mounting: threaded or direct to sight glass ØO.D. ¼ » 1"
    • Sensing range: 1»8mm gap (model dependent) between sensor surface & liquid including wall thickness of container
    • Output: switch (transistor) - either wet or dry sink for water based or non-conductive liquids
      • LED: power & switch
    • Setting: adjustable sensitivity for on-site calibration to media
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  • Gems Sensors CAP-150 - datasheet (PDF)
  • CAP-xxx series - manual (PDF)
  •  

    Gems Sensors LS-240-3E + LS-270 / LS-270-E bilge (marine) level switches

    • Designed for marine applications
      • Some units (LS-240-3E & LS-270-E) have Germanischer Lloyd (GL) or American Bureau of Shipping (ABS) approval
      • Can be ordered with Certificate of Conformance from factory 
      • Slosh shield stills liquid to prevent switch "chatter"
      • ATEX certified (Ex ia) model available LS-240-3E-Exi
    • Heavy duty applications (approx. 30mm float movement for switching)
    • Mounting: directly to tank wall or via U-bolt
    • Wetted materials: (vary between models) brass, 316SS, lucite & Buna N
    • Output: SPST (swappable NO / NC on-site) reed switch - choice of ratings (20 / 50 / 100VA)
    • Temperature: ranges -40 » 60°C (80°C option available)
    • Pressure: up to 10bar
    • S.G.: (vary between models) >0.53
    • Electrical connection: waterproof, 2m cable connection
    • Stocked models include:
      • LS-240-3E: 010-0965, 010-3433, 010-3434, 010-5002, 016-1418, 053-1221
      • LS-270: 43760, 43765
      • LS-270-E: 010-0349, 010-0350
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  • LS-270 - catalogue (PDF)
  • LS-270-E + LS-240-3E - catalogue (PDF)
  • Mounting bildge switches (JPG)
  • LS-270 - manual (PDF)
  • LS-240-3E + LS-270-E - manual (PDF)
  • Gems Sensors - Reed switch protection (PDF)