Designed to operate in full temperature range of -40 to 122°F, single-sensor, battery-powered MeshGuard detects hazardous levels of hydrogen sulfide or carbon monoxide. Unit is intrinsically safe for hazardous atmospheres and weatherproof to IP65 rating. Remote readings for up to 24 monitors are displayed on FMC 2000 wireless controller, which provides 4 programmable SPDT relays.