“Why are the temperatures displayed on car dashboards so misleading?” “This What reason could there be?”

Bride, Let’s answer.

Cars often show a temperature that is significantly higher than the actual temperature on a hot summer day.

The same goes for the cold weather on winter days. There are several reasons for this situation. First of all in the field of cars a built-in thermometer There is none.

So there are no thermometers in cars. There is a thermistor. The temperature is usually measured with a mercury thermometer. The liquid mercury in the thermometer expands and rises to a certain value when heat is added.

Again, when the temperature drops, it contracts and drops to a lower value. However, as a result of increasing or decreasing the temperature, thermistor may occur It measures the change in electric current.

In essence, the real problem is not in the thermistor itself. Because thermistors are accurate.

The real problem is where the thermistor is located in the car. Most manufacturers place the thermistor at the front of the car, place it behind the grill. Therefore, the car’s temperature readings come from an unusually warm location.

In addition, asphalt roads become very hot in hot weather. For this reason, a measurement was carried out just above the road surface temperature measurement will not be accurate. Because the temperature spreads upwards and therefore the thermistor in the car indicates this too high temperature. The same goes for cold winter days.

In other words, roads or any asphalt, They absorb incoming solar radiation excellently. They heat up quickly, causing the surface temperature to rise. Therefore, temperatures on asphalt are higher than on grassy or shaded surfaces.

For this reason, the temperature recorded by the car’s thermistor is much more indicative than the temperature on a road warmed or cooled by the sun.

Again, the thermistors are more sensitive when the car is parked or slow than when it is moving. It seems to give much more accurate results.. Finally, it is worth noting that these devices are not sensitive or powerful enough to distinguish differences of a few degrees.

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