NTC Sensors

NTC Sensors




NTC (Negative Temperature Coefficient) sensors change resistance based on temperature. As the temperature goes up the resistance goes down. This decrease in resistance causes the voltage drop across the sensor to decrease and the input signal voltage at the control module decreases.

Examples of NTC sensors

Intake Air Temperature Sensor




The intake air temp sensor provides a 0-5 volt analog signal to the DME indicating temperature of the incoming air.

The intake air temp sensor is located either in the intake manifold or integrated in the mass air flow meter.

Engine Coolant Temperature Sensor




A dual sensor is used for engine temp. Operation is the same as other NTC sensors, 0-5 volt operating range, except that two independent sensors are housed in one assembly.
One is for the engine temperature input to the DME.
The other sensor is used to input engine temp to the instrument cluster.

Typical Application of NTC Type sensor:
- Engine Coolant Temp Sensor
- Transmission Temp Sensor
- Intake Air Temp Sensor