当被测介质的压力作用于膜盒时，其自由端产生相应弹性变形一位移，经拔杆带动传动机构放大，由指示装置将被测压力在仪表度盘上指示出来。同时指针带动电接点装置的活动触点与设定指针上的触点（上限或下限）相接触的瞬时，致使控制系统接通或断开电路，以达到自动控制和发信报警的目的。 (图/文www.wxjianming.com)

英文版：

The stainless steel film electric contact pressure gauge overview

The stainless steel film electric contact pressure gauge is based on the structure and principle of the stainless steel film pressure meter is designed with micro pressure measuring instrument for corrosion resistance. Cause system and shell are made of stainless steel material, instrument with the corresponding supporting the use of electric devices, can be achieved on the measured pressure system to achieve pre-set and minimum or maximum pressure value of the double position automatic control and signalling (alarm) purpose.

Wuxi xierte pressure gauge factory specializing in the production and sales of stainless steel pressure gauges, brass, mixer, liquid level meter, vibration proof pressure gauge.

The structure principle

This instrument consists of measuring system (including joint, the membrane box), gear, indicating device, magnet electric contact device, housing, adjusting device and aviation skewer etc..

When the pressure of the measured medium to the film box, the free end of the elastic deformation and displacement, the transmission mechanism is driven by the pull rod amplifier, by indicating device indicates the pressure will be on meter dial. At the same time the pointer to the movable contact of electric contact device contacts on setting the pointer (upper or lower) of instantaneous contact, the control system is switched on or off circuit, in order to achieve the purpose of automatic control and alarm.