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What Is a Resistance Temperature Detector (RTD)? An RTD, also sometimes called a resistance temperature device, is a temperature sensor that measures temperature by correlating the electrical resistance of a material — commonly platinum — to temperature changes.
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An RTD (Resistance Temperature Detector) is a sensor whose resistance changes as its temperature changes. The resistance increases as the temperature of the sensor increases.
The RTD construction design may be enhanced to handle shock and vibration by including compacted magnesium oxide (MgO) powder inside the sheath. MgO is used to isolate the conductors from the external sheath and from each other.
An RTD or resistance thermometer stands for resistance temperature detector that is used for measuring the change in temperature by measuring the variation in resistance over the temperature range.
Because a nickel RTD is so sensitive, a low-cost, low-accuracy transmitter can measure the RTD with acceptable accuracy. Nickel RTDs are found in HVAC and other price sensitive applications.
What is an RTD sensor and how do they work? - PR electronics
RTD or resistance temperature detector is an electrical sensor used to measure the temperature of the environment by measuring the change in electrical resistance of a metallic wire.