BQJ104 DIGITAL PRESSURE CONTROLLER Description This is an intelligent digital displayed product for pressure testing and controlling. It integrates functions of measuring,display,output and control all in one.It has a complete electronic structure. Oil-filled piezo-restive pressure sensor with diaphragm is applied in the front part. The output is processed by high-precision & low-temperature drift amplifier,then transformed by high accuracy A/D converter into digital signal that could be processed by MPU(Micro Processor Unit). The processed signals control two switches then to test&control the pressure. With flexible application,simple handling,easy debugging and high reliability,this product is widely used applied to test & control the pressure of fluid medium in many industries including areas of hydroelectricity,city water,oil,chemical,machinery hydraulic system etc.