The Serinus 50 Sulfur Dioxide (SO2) analyser delivers precise and reliable performance at excellent value. It uses proven pulsed UV fluorescent radiation technology to measure SO2 in ambient air (LDL <0.3 ppb, Range 0-20 ppm). The Serinus range of analysers has been designed using our experience and knowledge gained from operating large air quality monitoring networks for more than 35 years. The result: instruments that integrate seamlessly into continuous monitoring networks. MCERTS, TUV and US EPA approved monitor.