LPG Gas Detector with NC/NO Relay Output Specifications:LPG Gas Detector with NC/NO Relay Output,Relay output gas detector, Induced gas: Natural gas, Town gas, LPG, Flashing LED and 75dB sound alarm. NC/NO signal outputs, Power Input: DC 12V power supply connecting red and black,Alarm Current: 100mA (At DC 12V). Highlight dual color LED indication, Alarm Sound Level: 75dB, Alarm Reset: Auto-reset. Electrify time &lt;=20 seconds, Operating Temperature: -10C ~ +55C, Operating Humidity &lt;=95%RH, Unit dimension: 0.38 x 0.38 x 0.15 in. Sensitivity: Natural gas: 0.1 - 0.5%, Town gas: 0.1 - 0.3%, LPG gas: 0.1 - 0.2%.