The electric contact pressure gauge is used to measure the positive and negative pressure of the gas and liquid medium which has no corrosive effect on copper and copper alloys, and to send out signals when the pressure reaches the predetermined value, and to turn on the control circuit to achieve the purpose of automatic alarm.

An adjustable permanent magnet is installed on the electric contact signal needle of the electric contact pressure gauge device, which can increase the contact attraction and accelerate the contact action, thus making the contact reliable and eliminating the arc. It can effectively avoid frequent closure of the contacts caused by the vibration of the working environment or the fluctuation of the medium pressure of the instrument. Therefore, the electric contact pressure gauge has the advantages of reliable operation, long service life and high contact switch power.