SF6 gas leakage monitoring device and method

The invention discloses an SF6 gas leakage monitoring device. The SF6 gas leakage monitoring device comprises a gas suction pipe, a gas suction pump, a test cavity and a gas outlet pipe which are sequentially arranged in the gas flowing direction, the plurality of air suction pipes are closely arranged on the outer side of the electrical equipment, and a plurality of air suction hoods are arranged on the air suction pipes and used for completely sucking air on the outer side of the electrical equipment into the test cavity. An infrared signal transmitter is arranged at the bottom of the test cavity and can generate infrared rays corresponding to typical absorption wavelengths of sulfur hexafluoride molecules; an infrared signal receiving plate is arranged at the position, corresponding to the infrared signal transmitter, of the top of the testing cavity, and the leakage condition of the SF6 gas is monitored through the infrared signal transmitter and the infrared signal receiving plate. As the volume of the t