将施加于压力传感器金属弹性元件表面的压力，通过字符型液晶显示屏显示的其数值，并随力的大小而变化，且显示压力的量程可以调节。压力超过量程时，显示屏显示过高还是过低，蜂鸣器报警，电机运行（压力传感器用滑动变阻器代替）-The pressure applied to the pressure sensor element elastic metal surface by character LCD display of its value, and with the magnitude of the force varies, and the display pressure range can be adjusted. When the pressure exceeds the range, the display shows too high or too low, the buzzer alarm, motor running (pressure sensor instead of sliding rheostat)