Electric contact pressure gouge is suitable for measuring the pressure of liquid, gas and steam which have no explosion risk, no crystallization, and no corrosive effect on copper. It is used in conjunction with electrical devices (such as relay, contactor) to pre-set the maximum or minimum pressure volue and achieve automatic control and signal (alarm) purposes for the controlled system. It has measurement and control functions, and the upper and lower limits of the controlled pressure can be set ccording to needs. It is widely used in petroleum, chemical, power station, metallurgy. water 5upply and other industries, a5 well 05 electromechanical equipment.