How to work coolant temperature sensor? কুল্যান্ট টেম্পারেচার সেন্সর কিভাবে কাজ করে?
In a car with an internal combustion engine, the cooling system maintains the optimal temperature of the engine and prevents it from overheating.
Engine coolant temperature (ECT) sensor
ECT sensor is connected to the engine computer or PCM
An engine coolant temperature sensor or ECT measures the temperature of the liquid coolant. A typical engine cooling temperature sensor is a Negative Temperature Coefficient (NTC) thermistor, which means its electrical resistance decreases when the temperature increases. The tip of the ECT sensor protrudes into one of the cooling system passages and is immersed in coolant.
Many cars have more than one coolant temperature sensor. In most cars, the primary ECT sensor (ECT sensor 1) is installed near the thermostat in the cylinder head or block or on the thermostat housing. A second coolant temperature sensor could be installed in another part of the engine, or in the radiator.
Some cars use a cylinder head temperature or CHT sensor instead of, or in addition to the ECT sensor. The CHT sensor (see the photo) works the same way, but it measures the temperature of the cylinder head metal and is not immersed in coolant. This allows the CHT sensor to measure the temperature of the engine correctly even with loss of coolant.
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