Leading the TriOS optical range of spectral UV sensors is the new generation OPUS, which, by analysing the full spectrum is able to deliver reliable readings for nitrate (NO3-N), nitrite (NO2-N), organic water ingredients (CODeq, BODeq, DOCeq, TOCeq) and SAC254.
Designed to complement or replace time, labour and cost consuming reagent based lab testing, the OPUS can be used in a wide range of fields from municipal water / wastewater to industrial water treatment, river, estuarine or oceanographic research for early warning and enhanced process understanding. After years of scientific monitoring around the world the OPUS is available with salinity compensation built into relevant calibrations.
Unlike other spectral sensors the OPUS examines only the UV spectrum, allowing significantly better resolution in sampling (0.8nm/pixel) compared with UV-VIS sensors that examine both UV and visual wavelengths (2.2nm/pixel). For the targeted variables this is critically important as they can only be measured in the UV range (200-360nm) and more coarse resolution may completely miss the narrow difference between nitrate and nitrite.
Like all TriOS photometers, the nanocoated hydrophobic lenses of the OPUS help repel build-up and can be replaced (in Australia) if they become damaged over time. As with other TriOS sensors the optical pathlength can be customised to suit individual applications and even changed (0.3-50mm) after purchase if the process conditions change.
The in-house R&D team at TriOS has developed a wide range of mounting options including inline pipe fitting, flowcell (with chemical or built-in ultrasonic cleaning), single or multisensor floats (e.g. couple with algal or oil in water) and even unmanned autonomous buoys with solar power and telemetry.
If a local display or transmitter is not required, the TriOS G2 interface allows direct integration of the sensor to existing systems or dataloggers via an integrated network (WiFi / LAN) or ModBus interface. Utilising the G2 module operators can quickly also configure or download from the OPUS via any standard web browser on any device.
The OPUS is available in both stainless steel and titanium bodies to ensure long functional life even in sea water applications.