Features: 1GAS LEAKAGE DETECTOR: Adopt semiconductor sensor, microprocessor intelligent control, with high stability, small sensitivity drift, fault detection function, practical and safe. 2MAIN FUNCTION: The gas alarm detector is mainly used in places where combustible gas such as liquefied petroleum gas, natural gas, biogas, etc. may leakage, to ensure human safety. 3AUTOMATIC MANUAL SWITCH: Gas solenoid valve uses electric and manual changeover switch, enable the manipulator to switch automatically and electrically, you can manually open the valve during power failure and maintenance, doubling the safety. 4WORK WITH: Gas leakage alarm system or fire control and other intelligent alarm control modules can be connected to realize on site or remote automatic manual cut off of the gas source, ensure the safety of gas use. 5SELF HOLDING: Solenoid valve skillfully utilizes the interaction of instantaneous electromagnetic force, permanent magnetic force and spring force to realize pulse drive self holding valve closing and manual valve opening self holding function. 6WIDE USAGE: The gas shut off valve can be widely used for automatic control of gas pipeline ball valve, gas cylinder ball valve, various connection alarms, other gas and liquid valves. Package included: 1 x Solenoid Valve 1 x Detector 2 x Anchor 2 x Screw 2 x Manual