Mining low-concentration methane sensor

The utility model relates to a mining low-concentration methane sensor. The mining low-concentration methane sensor comprises two layers of protection shells and a catalytic sensor, wherein the catalytic sensor is arranged between the two layers of protection shells. The mining low-concentration methane sensor is characterized in that an output circuit of the catalytic sensor comprises a processing controller and a secondary adjusting circuit, the secondary adjusting circuit is a compensation circuit, and the catalytic sensor can rotate for 360 degrees between the protection shells. By adopting the mining low-concentration methane sensor, the sensitivity adjusting way of a traditional methane sensor is changed, and the sensitivity of the sensor is adjusted by embedding a chip and a sensitivity adjusting circuit, so that the sensor is accurate in testing.