Modified universal refrigerant electronic leak detector

The utility model relates to a modified universal refrigerant electronic leak detector which comprises a gas sampling unit, a sensor, a signal amplifier, a shift switching device, a display device, an acoustic warning device, and a control device, wherein the control device comprises a microprocessor, a follower, a keyboard, a memory, a gear switching device of electrical connection, a photoelectric coupling device of the microprocessor, a display device of electrical connection, an analog-digital converting device of the microprocessor, the acoustic warning device of electrical connection and a warning control device of the microprocessor. The microprocessor is respectively and electrically connected with the keyboard, the follower and the memory. Accordingly, man-machine interaction operation which is scientific and easy can be conducted by the combination of the microprocessor and the keyboard; the digital design of the utility model can also make the reaction speed of a complete machine accelerated, and performance is stable.