TriOS Mess- und Datentechnik GmbH - Part of Xylem
About us
TriOS is a leading manufacturer of optical measurement technology, specializing in advanced optical immersion sensors for waste water treatment and water quality monitoring. Its portfolio includes photometers, fluorometers, and precision sensors for measuring parameters such as COD, TOC, nitrate, and turbidity. Serving drinking water, wastewater, environmental, and industrial applications, TriOS is recognized worldwide for its reliable and innovative monitoring solutions.
Since July 2026, TriOS has been part of Xylem (NYSE: XYL), a Fortune 500 global water technology company committed to helping customers and communities build a more water-secure world.
Products & services
FALCON by TriOS
Introducing the next generation of modular water quality monitoring: A robust, stainless steel or titanium housed multiparameter submersible probe engineered for precision, flexibility, and long term field performance. Available in 5 slot and 8 slot configurations, the system allows users to combine a wide range of digital sensors, creating customized measurement setups for any water monitoring challenge. Each port accepts any sensor from the product family, allowing users to tailor their configuration. FALCON features the SEPIA protocol as well as direct Modbus integration for seamless communication with Modbus RTU networks, data loggers, PLCs or customer specific systems.
OPUS UV spectral sensor
UV spectral sensor for online measurement of nitrogen and carbon with a resolution of 0.8 nm/pixel. OPUS is a spectral probe for the online measurement of nitrogen and carbon compounds. By analyzing a complete spectrum, OPUS is able to provide reliable readings for N-NO3, N-NO2, organic compounds (CODeq, BODeq, DOCeq, TOCeq) and a range of other parameters. OPUS is equipped with the new TriOS G2 interface, which enables simple and fast sensor configuration using a web browser. Integration into existing process control systems and external data loggers has never been easier. Using WLAN, a laptop, tablet or smartphone can then simply be used for control without the need to install special application software or an app.
NICO Digital, optical photometric in-situ sensor for nitrate
Digital, optical photometric in-situ sensor for nitrate with turbidity compensation. NICO is a low-cost UV photometer for the determination of nitrate. The four detection channels enable a precise optical determination of nitrate by absorption, taking into account turbidity and organic substances that pose a problem for many products currently on the market. An internal temperature correction additionally increases stability of the measured values. Equipped with our G2 interface with web browser configuration and internal data logger, NICO includes features that are much more advanced than those of comparable devices available on the market. The unified platform of all TriOS photometers also facilitates a standardized spare parts and consumables system, which allows the use of a wide range of accessories for our devices. Furthermore the cutting-edge G2 interface enables quick integration into third-party systems.
LISA LISA – the state of the art SAC254 sensor by TriOS
Inexpensive state-of-the-art UV254 absorption photometer. The integrated UV-LED-technology ensures a long product lifetime. Long-lasting and energy-efficient UV-LED technology and a robust design are the core features of LISA UV. Like all TriOS sensors LISA uses the unique nano coated windows combined with compressed air flushing to achieve long operating times without cleaning. The TriOS G2 interface allows quick and easy integration of the sensor into existing process control systems or external data loggers. In addition to the integrated network interface, LISA UV is available with digital or analog output. The sensor can easily be configured through any standard web browser on a PC, tablet or smartphone. The optical path length can be adapted to the application at any time by various lens sockets. An automatic turbidity compensation is carried out by a second measuring channel. Through application-specific correlation LISA UV can be configured for direct output of BODeq, CODeq, TOCeq. A direct output of UVT254 is also possible. LISA – cutting-edge measurement technology at low investment and operating costs.
microFlu V2 fluorometers are submersible miniature fluorometers
Submersible miniature fluorometer for highly accurate and selective measurement of tryptophan, CDOM, blue-green algae or chlorophyll a. The combination of low power consumption and innovative coating of the measurement windows as an energy and environmentally neutral antifouling solution ensures long-term stability of the measurements. The instruments can be used in a wide range of applications for monitoring seawater, river water, drinking water and wastewater. Internal reference measurements of the high-power LED used for fluorescence excitation compensate for aging effects and temperature influences. microFlu V2 is equipped with a RS-485 interface, which enables allows easy and fast sensor configuration via Modbus. Integration into existing process control systems and external data loggers has never been easier.
TW Master Series The TW Master Series is a product line specially developed for the accurate analysis of drinking water.
The Solution for Precision Drinking Water Analysis The TW Master Series was developed specifically for drinking water analysis and offers precise measurement parameters tailored to the high demands of water monitoring. Thanks to its modular design, it allows for flexible combinations of parameters to meet a variety of application requirements. The new TW eCHEM offers slots for two electrochemical sensors of your choice, opening up individual combination possibilities. Oxygen, pH, conductivity, or chlorine (free chlorine, total chlorine) - choose the right combination for your application. The new TW Turb, installed in series in the bypass with the TW eCHEM, supplements drinking water monitoring with turbidity values. Together with the integrated power and communication module TW PS300, the modules on the panel enable the monitoring of values for quality control and process control of your systems. The current version of this outstanding analyzer impresses with enhanced ease of use, as well as long service life and reliability.
eCHEM
The TriOS eCHEM series offers a wide range of electrochemical sensors for analysing water. In addition to sensors for determining of pH and turbidity, you also receive probes for measuring conductivity and dissolved oxygen. All eCHEM sensors are available with cable lengths of 10 m or 2 m.
TTurb Digital sensor for optical turbidity measurment
The TTurb is a digital sensor used for optical turbidity measurement according to the 90° IR scattered light method. Depending on the sensor version, it can be used in both pure water up to 100 FNU as well as in raw, waste and process waters up to 1000 FNU. The TTurb is available with a 10-meter or a 2-meter cable.
SEPIA LoLA Lab Controller
LoLA Lab Controller – Precision Bench Device For high‑accuracy water quality measurements, reliable calibration is essential. The Lab Controller LoLA is a compact, benchtop device engineered specifically for the calibration and verification of all digital sensors within the system portfolio. It provides a controlled laboratory environment where each sensor can be calibrated with maximum precision before deployment in the field. In addition, the device is fully suitable for independent use in the laboratory, enabling precise measurements and workflows.
News
TriOS Product Portfolio
Discover the variety of the TriOS product range and convince yourself of the high quality of all our products.
OPUS (aero) in biological waste water treatment
TriOS OPUS and OPUS (aero) are powerful spectral probes for the online measurement of Nitrate and Nitrite in aeration tanks.
Xylem to Expand Real-Time Water Quality Monitoring with TriOS Acquisition
New advanced sensing capabilities will strengthen existing portfolio, helping utilities and industry respond