本电路主要是利用0—5伏的压力传感器检测气体的压力并送显，采用四位数码管，显示其压力值，传感器的0—5伏对应加气机加气压力的0—30Mpa，送到汉显的显示值就是加气机气体的压力值，压力值精确小数点后一位，在实际加气中，按照国家规程规定，其加气压力不得高于20Mpa,所以，此电中用在实际中，可直观显示其加气压力，最低压力显示00.0 Mpa，最高显示29.9Mpa。

电路结构简单，数码显示可精确到小数点后一位。

-The key is to use 0-5 volt circuit pressure sensor detects pressure of the gas and sent significant, the use of four digital control, display the pressure value, sensor 0-5 V corresponding dispenser filling pressure 0-30Mpa, send to the display value is the Chinese character display dispenser gas pressure, the pressure for the accurate one decimal place, the actual rate of gas, according to state rules of order, the filling pressure shall not exceed 20Mpa, therefore, the electricity used in the In practice, we can directly display the air pressure increases, the minimum pressure display 00.0 Mpa, the maximum display 29.9Mpa. Simple circuit structure, the digital display is accurate to one decimal place.