Electronic flow pressure controller of gas chromatograph

The utility model discloses an electronic flow pressure controller of gas chromatograph, which comprises at least one pressure maintaining valve and at least one needle valve; moreover, the electronic flow pressure controller of gas chromatograph also comprises at least one proportional valve, at least one flow sensor and a detection control circuit. The pressure maintaining valve is connected with the needle valve and the proportional valve; the gas source of the gas chromatograph passes through the pressure maintaining valve, the needle valve and the proportional valve and then enters a detector after being detected by the flow sensor. The detection control circuit adjusts the control flow of the proportional valve according to the data and preset value provided by the flow sensor. The electronic flow pressure controller of gas chromatograph adopts the electronic flow pressure controller to replace a mechanical adjusting valve and a mechanical pressure meter to achieve that the flow control precise of the m