Advantages of Coolant Sensor | disadvantages of Coolant Sensor

This page covers advantages and disadvantages of Coolant Sensor. It mentions Coolant Sensor advantages or benefits and Coolant Sensor disadvantages or drawbacks. It is known as coolant temperature sensor due to its working operation.

What is Coolant Sensor?

• It functions as temperature sensor similar to thermistor.
• It is NTC (Negative Temperature Coefficient) type.
• Its resistance decreases when the coolant temperature increases and resistance increases when coolant temperature decreases.
• It is located on cylinder head of the engine.
• It is used to turn on or off cooling fan of the engine or to activate emission controls.

Coolant Sensor Connection Diagram

Refer Coolant Sensor basics >> for more information.

Benefits or advantages of Coolant Sensor

Following are the benefits or advantages of Coolant Sensor:
➨It safeguards overheating of the engines used in cars and other motor vehicles.
➨They just require two wire measurement of resistance in ohms.
➨They provide fast response.
➨They are very sensitive and provides large output change based on input temperature.
➨They are more accurate compare to RTDs and thermocouples.
➨They are inexpensive and available in small sizes.

Drawbacks or disadvantages of Coolant Sensor

Following are the drawbacks or disadvantages of Coolant Sensor:
➨They have limited temperature range.
➨They require current source for its operation.
➨They are fragile.
➨The output is non-linear function.
➨They gets self heated. In order to limit the self heating error, care must be taken to limit the sensing current to lower value.

Also refer advantages and disadvantages of Thermocouple, RTD and Thermistor >> as well as normal Temperature Sensor >>.

Advantages and Disadvantages of other Sensor Types

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