Universal refrigerant electron leak detector

The utility model relates to a universal refrigerant electronic leak detector. The utility model is characterized in that the utility model comprises a gas sampling unit, a sensor, a signal operation amplifying loop, a regulating loop and a display alarm unit, wherein, the gas sampling unit is composed of a suction lead, a two-stage filter which is connected with the suction lead, connection, a precise flowrate regulating valve of a flow meter, an electromagnetic type sorption pump and a gas sensor, the gas sensor and the sorption pump are fixedly arranged in a host. The gas sensor is respectively connected with an automatic-catch amplifying circuit and a manual-catch amplifying circuit, and the two circuits are connected with a common range switching circuit through a time delay circuit. The common range switching circuit which is connected with a power amplifying circuit of a sound pressing and controlling oscillator through an alarm comparator in an alarm circuit is connected with a digital voltmeter, and a power supply circuit supplies electricity for a complete machine.