Chemtron Science Laboratories Pvt. Ltd supplies Portable Detector. Chemtron Science Laboratories Pvt. Ltd is an ISO 9001: 2000 certified company. This Portable Detector, Sniffers has Typical Measurement Ranges like: 0-100% LEL [Hydrocarbon`s] 0-25% Oxygen 0-200 ppm, 0-2000 ppm H2S 0-200 ppm CO 0-4% CO 0-100 ppm SO2 0-20 ppm CL2 0-20 ppm NO2 0-100 ppm NO 0-50 ppm NH3 0-50 ppm HCI 0-1000 ppm H2 0-20 ppm Ethylene Oxide