Electrochemical sensor to detect CO carbon monoxide. Shock proof body. Internal luminous and acoustic alarms. 3 warning LED: Green LED: the device works properly, Yellow LED: malfunction, Red LED: ALARM, CO carbon monoxide is being detectedSensor life: 5 years from the production date (see replacement date on the device). The relay of the device is a “sealed” type and filled with inert gas that guarantees the absence of sparks when commuting. Electric featuresPower supply: 230Vca 50Hz. Consumption: 4 VA. Output through electromagnetic relay. Contacts rating: 6(2)A – 250Vca.