RTD (Resistance Temperature Detector) sensor is a passive device used to sense temperature that operates on the principle that the resistance of metal changes.
RTD sensors are used to calculate the resistance of the sensor by passing a small electrical current through the sensor.
Working of RTD Sensor
The current passing through the resistor of the sensor creates a resistance value that is calculated by an attached component that correlates it to the temperature based on the resistance characteristics of the RTD sensor.
The resistance can be calculated, then used to supply temperature readings.
The working of the RTD sensor is only based on the relationship between resistance and temperature of the material used for its construction.
In the RTD sensor platinum, copper, or nickel is used during construction, platinum metal has a stable relation between resistance – temperature across a wide range of temp.
Application of RTD Sensor
This sensor is used in automotive to calculate the engine temperature, an oil level sensor, and intake air temperature sensors.
It is used in power electronics, computer, consumer electronics, food handling and processing, industrial electronics, medical electronics, military, and aerospace.
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