Gems Sensors & Controls

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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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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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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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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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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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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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)

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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

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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-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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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 )

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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, 238439 OEM model (100372069, FS-16270)
  • FS-200E: 020-2407, 020-3481, 020-0783, 020-0799
• OEM & Special (Marine) models including:
  • FS-200-UE-JB-1.00-V-3.0-A-S (reorder 607847, 25613227), FS-200-UE-JB-1.25-V-01.00-A-S (reorder 181107, 25613229), FS-200-UE-JB-1.00-V-0.5-A-S (reorder 607845, 25613507), FS-200-UE-JB-1.00-V-1.5-A-S (reorder 605213, 25613508), FS-200-UE-JB-1.00-V-2.50-A-S (reorder 607848, 25613509), FS-200-UE-JB-1.00-V-4.0-A-S (reorder 607846, 25613510), FS-200-UE-LW-0.50-V-05.50-A-S (reorder 151505, 25613576)

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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

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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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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-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

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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

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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 (repair kits available for some models)

**NOTE**

For horizontal flow the indicator should be installed with the "bowl" below the pipe centreline.

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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

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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

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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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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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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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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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Gems Sensors LS-1700 top / bottom mount, small size float switches

• Stocked models include: 01701, 01702 & 011-1700

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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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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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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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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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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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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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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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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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Gems Sensors ELS-1100 Electro-Optic General Purpose Liquid Level 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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Gems Sensors ELS-950 Electro-Optic Rugged Level Sensor

• Compact, rugged electro-optic level switch designed for sensing a wide range of media including OHV (off-highway vehicle) type fluids.
• Offers excellent temperature & pressure capabilities for an engineering plastic point level switch.
• Materials: polysulfone, flurocarbon, TPE (over-molded)
• Pressure: 0 » 250PSIg (0»17bar) max.
• Temperature:  -40 » 110°C
• Output: sink 40mA max. (solid state) up to 30VDC 
  • Wet & Dry activation models available
  • Refer also optional Opto-Pak Controller (link) for relay output
• Supply: 5 & 12VDC models (±10%)
• Process Connections: ¼" NPT, ½"-20UNF-2B, M12x1-8
  • NOTE: UNF & M12 models supplied with matching flurocarbon o-ring
• Electrical connection: flying leads (IP66/67)
• Approvals: CE & UL, ROHS compliant
• Stocked models include: 224501

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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 )
• ¼” NPT threaded

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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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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: –40 » 100°C
• Pressure: up to 172 bar
• TTL/CMOS compatible( open collector output )
• ½” & ¾” NPT threaded

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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 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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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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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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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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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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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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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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Gems Sensors UCL-200 continuous ultrasonic level transmitter

**discontinued - please ask us for remaining stock or alternatives**

• 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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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 – 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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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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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 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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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 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 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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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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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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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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Warrick general purpose plug-in conductive sensors

• Manufactured by Gems Sensors & Controls (USA)

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Warrick conductive sensor fittings & probes

• Manufactured by Gems Sensors & Controls (USA)

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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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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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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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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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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-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-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
• Some OEM models now obsolete, refer CC Level (here) for replacement equivalents:
  • TH-700's including re-order codes: 329812, 329813, 330450
  • TM-700's including re-order codes: 330048

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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 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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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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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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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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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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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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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 Sensors D Series solenoid valves

• For maximum flow in a miniature solenoid valve the D Series valves deliver a wide range of C_V values 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-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 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 C_V 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 & 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 & 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 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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