Online UV and UV-Vis spectroscopy gives operators a fast, reliable and reagent-free way to understand water quality in real time. Instead of relying only on laboratory sampling, online optical sensors can continuously monitor key water quality parameters directly in the process, in a flow cell or at remote monitoring locations.
PMA supplies and supports advanced TriOS optical sensors for online water quality monitoring across drinking water, wastewater, environmental monitoring and industrial process applications. These sensors use proven UV absorption, spectral analysis and optical measurement techniques to provide continuous insight into nitrogen compounds, organic loading, UV254, SAC254, turbidity-related values and other important water quality indicators.
For water companies, industrial operators and process engineers, online UV and UV-Vis monitoring can support process control, event detection, compliance awareness, chemical dosing optimisation and operational decision-making.
Multi-Parameter UV-Absorption Sensor for real-time nitrate, organic carbon, and UVT254 monitoring in water and wastewater applications.
Advanced UV254 Absorption Sensor for real-time organic compound, TOC, and UVT254 monitoring in water quality applications.
UV and Vis spectroscopy are powerful techniques for monitoring water quality because many important substances absorb light at specific wavelengths. By analysing light absorption across selected UV or visible wavelengths, online optical sensors can provide continuous measurement of parameters that would traditionally require manual sampling or laboratory analysis.
Depending on the application and sensor configuration, UV and Vis monitoring can be used for:
The main benefit is simple: operators get continuous water quality data without reagents, without complex sample preparation and without waiting for laboratory results.
PMA provides a range of TriOS online optical sensors that can be used for UV and UV-Vis water quality monitoring. The best sensor depends on the required parameters, water type, installation location, measuring range and process conditions.
OPUS is a spectral UV probe for online measurement of nitrogen and carbon-related parameters in water. By analysing a full UV spectrum, OPUS can provide reliable online readings for nitrate, nitrite and organic equivalent parameters including CODeq, BODeq, DOCeq and TOCeq.
OPUS is well suited to applications where operators need a broader understanding of water quality from a single online optical sensor. Typical applications include wastewater monitoring, environmental monitoring, drinking water monitoring and industrial water quality applications.
Key parameters include:
OPUS is particularly useful where real-time nitrogen and organic load monitoring can support process control, event detection and operational visibility.
Explore our advanced final effluent monitoring solutions for nitrate, nitrite, UV254, and organic load. Ensure compliance and protect the environment with real-time, low-maintenance sensors from Aquamonitrix® and TriOS.
Continuous monitoring without reagents
NICO plus is a versatile UV photometer for nitrate and SAC254 determination, with additional water quality parameters available from the same sensor platform. It is designed for real-time online monitoring and can be used in sewage treatment plants, environmental monitoring, drinking water monitoring and industrial applications.
NICO plus is a strong option where nitrate monitoring is required alongside UV254, SAC254 and organic equivalent parameters.
Key parameters include:
For sites that need online nitrate monitoring with additional UV absorption data, NICO plus provides a compact and reagent-free solution.
LISA UV is an innovative SAC254 and UV254 sensor designed for online water quality monitoring with low investment and low operating costs. It uses durable UV LED technology and can be configured for direct output of UVT, CODeq, BODeq and TOCeq using application-specific correlation.
LISA UV is particularly relevant for drinking water, wastewater, environmental monitoring and UV disinfection monitoring applications where operators need robust UV254, SAC254 or UV transmittance data.
Key parameters include:
LISA UV is a practical choice for sites that need reliable online UV254 or SAC254 monitoring without reagents and without complex sample preparation.
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Established in 1971 PMA is a well-recognised and award winning provider of online instrumentation for process control and compliance monitoring. With expertise in analytical techniques such as Photometry, Colorimetry, Ion-selective electrodes (ISEs), Titration, Fluorescence, Ultrasonics and more.
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