EATON Universal Resistance Temperature Detectors
Eaton universal resistance temperature detectors (RTDs) are devices used for measuring temperature by determining the electrical resistance of a material. They can be used in conjunction with the MP-3000, IQ1000 II, IQ1000 and IO2000 motor protection relays. These RTDs are connected to a measuring instrument or controller, which measures the electric resistance and calculates the temperature. They have robust construction, making them durable and allowing operation in harsh environments & vibrations....Read more
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AWorking Mechanism
- They consist of a thin wire or film of a temperature-sensitive material, such as platinum, nickel or copper, wrapped around a ceramic or glass core to predict changes in resistance with temperature.
- The RTD is connected to a measuring instrument or controller, which applies a small electrical current through the RTD and measures the voltage across the unit. This controller then uses the information to calculate the resistance of the RTD wire and hence the temperature.
Frequently Asked Questions
How to install a resistance temperature detector?
An RTD (resistance temperature detector) is connected to a measuring instrument or controller using wires and then physically placed in contact with the system or process to be measured.
How to measure temperature using a resistance sensor?
- The resistance is measured as an electric current passing through the sensor, thus producing a voltage.
- Using this resistance information, the sensor can determine the temperature change.
Why are RTDs considered better than thermocouples in terms of accuracy?
- RTDs have higher accuracy than thermocouples, with an accuracy of 0.1 to 0.3 percent as opposed to thermocouples with 1 to 2 percent reading accuracy.
- RTDs also have a wider temperature range than thermocouples, ranging between -200 and 600 degrees Celsius.
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