pressure is used to push the sliding resistance potentiometer to move, change the current of the oil pressure gauge, change the position of the pointer, connect the amplified pressure signal to the oil pressure indicator through the signal line, and change
the ratio of the current passed by the two coils inside the oil pressure indicator. Thus indicating the engine oil pressure. The
oil pressure sensor is composed of a thick film pressure sensor chip, a signal processing circuit, a shell, a fixed circuit board device and 2 leads, etc. The signal processing circuit is composed of a power supply circuit, a sensor compensation circuit, a zeroing circuit, a voltage amplifying circuit, a current amplifying circuit, a filter circuit and an alarm circuit