The CM4 gas monitor provides monitoring of toxic gases at four locations, up to 300 feet away. Points are monitored continuously. Leaks are detected within seconds. CM4 is a reliable and continuous solution to your toxic and corrosive gas monitoring needs, featuring well proven and minimal maintenance. CM4 guards semiconductor, pharmaceutical and chemical plants around the world. It complies with all UHC/IFC definitions of “continuous monitoring”. CM4 offers calibrations for more than 25 toxic gases including ammonia, oxidizers, hydrides, mineral acids, hydrogen cyanide, hydrogen sulfide, PFCs, phosgene, and nitrogen trifluoride via pyrolysis to hyrdrogen fluorides. The CM4 monitoring system is gas specific – your facility won’t be shut down by false alarms caused by cross-contaminants. If a major gas event occurs, CM4 will report the alarm, advance a fresh sensor, and continue monitoring. There is no interrupted surveillance.