As we all know, chlorine is a toxic gas greenish yellow gas with a characteristic odour. This Portable Chlorine Cl2 Gas Detector is designed to accurately measure concentrations of this highly toxic gas. This detector is detectable in concentrations of 0 to 10 ppm. It will alarm immediately once the detected gas concentration reaches or exceeds the preset alarm point. Users can set the low and high alarm point according to the practical need. ATO Portable Chlorine Cl2 Gas Leak Detector are economical to purchase, economical to maintain, and provide long term accuracy and reliability for your chlorine monitoring needs.