Tethys manufactures various measurement technologies for water quality measurements such as UV Spectroscopy, UV Spectroscopy after gas stripping, UV Fluorescence, Colorimetric, Nephelometric, Electrochemical Sensors. Tethys offers unique modular concept wherein multiple measurement technologies can be integrated in one analyser. Thanks to the Tethys R&D team who invented innovative modular concept for online water analysers which allows measurement of various parameters – even if it follows different measurement technology – in one analyser. For example, Tethys can offer in one analyser – measurements like COD (UV Spectroscopy), Ammonia – NH4 (UV Spectroscopy after gas stripping), Oil-in-water (UV Fluorescence), Phosphate (Colorimetric), Turbidity (Nephelometric), pH, DO, TSS (External Sensor attachment).