AVAILABLE FOR METHANE GAS AND LPG. Leds: power supply (green), failure (yellow), alarm (red). Optical (red led) and acoustic (internal buzzer 87dBA) alarms. Provided with realy output. Power supply: 230Vac. Max electrical input: 20mA 230Vac. Max relay contact load: 20,5 (1,2) A. Class of protection: IP 42. Working temperature: -10°C, 40°C. Working relative humidity: 30%, 90%. Alarm level: gas concentration equal to 10% of L.E.L. (Low Exposition Limit). 4 years after installation date the device must be put out of order and replaced with a new unit. Dimension: 138x85x44 mm. CEI UNI EN 50194.