Resistance Thermometer
Resistance thermometers, also called resistance temperature detectors (RTDs), are sensors used to measure temperature by correlating the resistance of the RTD element with temperature. Most RTD elements consist of a length of fine coiled wire wrapped around a ceramic or glass core. The element is usually quite fragile, so it is often placed inside a sheathed probe to protect it. The RTD element is made from a pure material, platinum, nickel or copper. The material has a predictable change in resistance as the temperature changes; it is this predictable change that is used to determine temperature.
They are slowly replacing the use of thermocouples in many industrial applications below 600 °C, due to higher accuracy and repeatability.
Read more about Resistance Thermometer: R Vs T Relationship of Various Metals, Calibration, Element Types, Function, Advantages and Limitations, Construction, Classifications of RTDs, Applications, History, Standard Resistance Thermometer Data, Values For Various Popular Resistance Thermometers, The Function For Temperature Value Acquisition (C++)
Famous quotes containing the word resistance:
“The resistance we make to our passions is due to their weakness, not our strength.”
—François, Duc De La Rochefoucauld (1613–1680)