The Serinus 57 Total Reduced Sulfur analyser delivers precise and reliable performance at excellent value. It uses proven UV fluorescent radiation technology and an external thermal converter to measure TRS in ambient air (LDL <0.3 ppb, Range 0-2 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 40 years. The result: instruments that integrate seamlessly into continuous monitoring networks.