electronic gauge set for water temp

• 2022-11-01

The sensor of the electronic gauge set water temp gauge is a thermistor sensor. Screw onto the engine cooling channel. The thermistor determines the current flowing through the coil winding of the electronic water temp gauge set. This drives the pointer of the meter to swing. When the ignition switch is turned on, current flows through the water temperature indicator and the sensor. When the temperature of the cooling water is low, the resistance of the thermistor in the sensor is large, and the difference between the current flowing through the coil L1 and L2 is not much, but the number of L1 turns is large, resulting in a strong magnetic field, so that the armature drives the pointer to deflect to the left, and the pointer points to the low temperature scale. When the temperature of the cooling water rises, the resistance of the thermistor decreases, the current in coil L2 increases significantly, and the electromagnetic force also increases, so that the armature drives the pointer to deflect to the right, and the pointer of the water temperature gauge points to the high temperature scale.

The sensor of the electronic water temp gauge is a thermistor sensor. Screw onto the engine cooling channel. The thermistor determines the current flowing through the coil winding of the water temperature gauge. This drives the pointer of the meter to swing. In the past, tap water was used as the cooling water for automobile engines. Now many automobile engine cooling systems use special coolant. Therefore, it is also called coolant temperature gauge.

The thermometer is used to indicate the operating temperature of the engine cooling water. The bimetal electronic water temp gauge set is composed of an indicator mounted on the instrument panel, a temperature sensor mounted on the engine water jacket and connecting wires. The structure of the bimetallic thermometer is identical to that of the oil pressure gauge, except that the scale is different, and the indication direction of the scale is exactly opposite, that is, the bimetallic sheet is bent and deformed to make the pointer point to the maximum position at low temperature, while it indicates high temperature when it is straightened. The temperature sensor of the bimetallic thermometer is a sealed sleeve. A heating coil is wound on the strip bimetallic strip. One end of the coil is connected to the bimetallic strip, and the other end is connected to the contact strip. The fixed contact is directly grounded.