At PMA Ltd, we are proud to announce our expanded partnership with TriOS, a global leader in optical sensor technology for real-time water quality monitoring. With over 50 years of experience in process analysis and environmental instrumentation, PMA is now the official UK distributor of the full TriOS sensor range — delivering advanced, high-performance solutions across drinking water, wastewater, industrial processes, and environmental monitoring.
Whether you need to measure UV254, nitrate, turbidity, pH, conductivity, or perform multi-parameter water analysis, TriOS offers low-maintenance, reagent-free water monitoring systems built for long-term reliability.
What Makes TriOS Water Quality Sensors Different?
The TriOS product line includes UV Absorption sensors, hyperspectral photometers, and electrochemical probes — all engineered to provide real-time, in-situ water quality monitoring with robust design and reliable data output. Each sensor supports Modbus RTU, RS-485, and Ethernet for full SCADA system integration or remote transmission via telemetry.
Their nano-coated optics, stainless steel or titanium housings, and non-contact measurement principles mean lower maintenance, longer operating life, and greater confidence in your data.
The TriOS Range – Sensor Overview
OPUS – UV Spectral Sensor for Water Quality Monitoring
The TriOS OPUS UV-Vis sensor provides high-resolution spectral data for nitrate, nitrite, SAC254, BOD, COD, and UV254. With turbidity compensation and advanced calibration, OPUS is ideal for wastewater, process water, and environmental analysis applications.
NICO – Reagent-Free Nitrate Sensor (UK Ready)
NICO is a compact, real-time nitrate sensor using UV absorption to detect NO₃-N with precision. Designed for drinking water, groundwater, and effluent monitoring, it’s a powerful alternative to traditional nitrate analysers, with no reagents required and simple integration with your SCADA or telemetry system.
NICO Plus – Multi-Parameter UV Sensor
This advanced multi-parameter sensor builds on the NICO by also measuring UVT254, CODeq, BODeq, TOCeq, DOCeq, SAC254, turbidity, and TSSeq. With real-time UV absorption analysis, the NICO Plus is ideal for comprehensive water quality monitoring across municipal, industrial, and research settings.
LISA UV – UV254 Analyser for Drinking Water & UV Disinfection
A cost-effective UV254 absorption sensor, LISA UV enables real-time monitoring of TOCeq, COD, BOD, and UVT254. It’s widely used for UV disinfection control, drinking water treatment, and surface water assessment. Like all TriOS sensors, it operates without reagents and features anti-fouling nano-coated optics.
VIPER – VIS Hyperspectral Photometer
VIPER is a hyperspectral VIS photometer designed to monitor colour, SAC, and attenuation coefficients from 360–750 nm. Ideal for petrochemistry, colour analysis in processed water, and drinking water clarity, VIPER provides real-time, high-accuracy results with no need for sample preparation.
TORP – Online ORP Sensor (Redox Monitoring)
The TriOS TORP is a digital oxidation-reduction potential (ORP) sensor, ideal for redox control in wastewater treatment, industrial effluent, and aeration control systems. With a gold electrode and Ag/AgCl reference, it ensures stable, drift-free operation in a compact, RS485-compatible form.
TW Master Series – Modular Water Quality Monitoring Systems
The TW Master Series from TriOS introduces a DIN rail-mounted, low-power modular platform for online water quality monitoring in drinking water systems, labs, and smart infrastructure. Each module is compact, scalable, and designed for easy configuration and setup.
Current modules include:
- TW Turb – Online turbidity analyser for drinking water
- TW pH / EC – Combined pH sensor and electrical conductivity sensor
- Additional modules (in development): Nitrate, Dissolved Oxygen, Chlorine, and Fluorescence (tryptophan, chlorophyll, CDOM, PAH)
Solar & Remote Monitoring Ready
All TriOS instruments are compatible with solar-powered data logging systems, such as the Consibio Logger v3, which supports remote monitoring over 4G/5G networks. This makes them ideal for unattended field installations, such as boreholes, rivers, storm drains, and remote WTW/WWTP outposts.
These solutions allow for automated data logging, cloud integration, and reduced site visits saving time, cost, and environmental impact.
Why Choose PMA Ltd?
With over five decades of experience delivering analytical solutions to the UK water industry, PMA Ltd combines technical expertise with trusted support. We don’t just supply equipment we provide complete guidance, from system design and integration to training and long-term maintenance.
Whether you need UV-Vis sensors, a nitrate analyser, or a complete multi-parameter water quality system, our team will help you build the right solution for your application.
Ready to Transform Your Monitoring System?
We now supply the entire TriOS range to clients across the UK water, industrial, and environmental sectors. If you’re looking for a reliable, reagent-free, real-time water quality monitoring solution, we’d be happy to discuss it with you.
Contact PMA Ltd today to discuss your project, request a quotation, or book a product demo.