A Review Study on Methane Gas Sensors

With the rapid development of coal industry, the hidden danger of coal safety production in China is becoming increasingly prominent, mainly in the coal mine gas exceeding the standard seriously. Therefore, it is necessary to monitor the gas in real time to control the gas concentration. At present, most mines in our country use catalytic gas sensor, which is easily affected by the bad field environment of coal mine, with poor acquisition accuracy and serious zero drift. It needs to be corrected every certain time, which not only increases the maintenance cost, but also reduces the data acquisition accuracy. At the same time, the catalytic sensor is prone to catalyst poisoning, so the service life of the sensor is short. The infrared gas sensor uses infrared spectrum to detect the target gas, which is basically not affected by the industrial environment. The double channel sampling technology can restrain the zero drift. Compared with catalytic gas sensor, infrared gas sensor has higher accuracy and reliability, especially suitable for harsh industrial environment such as coal mine. This paper is review on the current innovation and process of work of Methane sensors