What is a gas alarm? As the name implies, the gas alarm is a gas leak detection alarm device. When a flammable or toxic gas leaks in the industrial environment, the alarm will give an alarm signal when the gas alarm detects that the gas concentration reaches the critical point where the explosion or poisoning alarm is set. To remind the work to take safety measures, and drive the exhaust, cut off, spray system, to prevent explosions, fires, poisoning accidents, thus ensuring safe production. The structure of the gas alarm device: The industrial fixed gas alarm consists of an alarm controller and a detector. The controller can be placed in a duty room. It mainly controls each monitoring point. The detector is installed in the place where the gas leaks most easily. The core component is built-in gas. The sensor and sensor detect the concentration of gas in the air. The detector converts the concentration of gas detected by the sensor into an electric signal and transmits it to the controller through the cable. The higher the gas concentration, the stronger the electric signal, when the gas concentration reaches or exceeds the alarm control. When the alarm point is set by the device, the alarm device will send an alarm signal and activate the external devices such as the solenoid valve and the exhaust fan to automatically eliminate hidden dangers. The portable gas detector is handheld, the staff can carry it to detect the concentration of gas in different locations, the portable gas detector sets the controller and the detector in one compact and flexible. Compared with the fixed gas alarm, the main difference is the portable gas. The detector cannot be externally connected to other equipment. Classification of gas alarms According to the detection gas can be divided into: combustible gas alarm, toxic gas alarm and composite gas alarm, gas alarm using different sensors to detect different gases ,Compound gas alarm can detect combustible and toxic gases at the same time. According to the use of the environment can be divided into: industrial gas alarm and household gas alarm. According to their own form can be divided into fixed gas alarm and portable gas detector.