ATO Fixed Carbon Monoxide Gas Detector, 4-20mA Signal Output, CO Gas Leak Detector 0 to 100/500/1000 ppm, with Sound and Light Alarm (0-2000ppm, 2NO+2NC)

ATO Fixed Carbon Monoxide Gas Detector, 4-20mA Signal Output, CO Gas Leak Detector 0 to 100/500/1000 ppm, with Sound and Light Alarm (0-2000ppm, 2NO+2NC)