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SPRTs commonly use reference-grade, high-purity smaller-diameter platinum wire, metal sheaths and ceramic type insulators. Internal lead wires are usually a nickel-based alloy. Standard PRTs are more limited in temperature range (−200 °C to 500 °C) and are approximately accurate to ±0.03 °C over the temperature range.
The thermometer measured temperatures with accuracy from -190 °C to 660 °C. His results were praised by J.J Thomson for providing a new tool that “could determine temperatures with an ease and accuracy never obtainable before”. [6] Callendar improved the heat range of his platinum thermometer from -200 °C up to 1000 °C.
They are not used in oxidizing environments at high temperatures because of embrittlement. [22] A typical range is 0 to 2315 °C, which can be extended to 2760 °C in inert atmosphere and to 3000 °C for brief measurements. [23] Pure tungsten at high temperatures undergoes recrystallization and becomes brittle. Therefore, types C and D are ...
As quoted in an online version of: David R. Lide (ed), CRC Handbook of Chemistry and Physics, 84th Edition.CRC Press. Boca Raton, Florida, 2003; Section 4, Properties of the Elements and Inorganic Compounds; Physical Properties of the Rare Earth Metals
The Callendar–Van Dusen equation is an equation that describes the relationship between resistance (R) and temperature (T) of platinum resistance thermometers (RTD).. As commonly used for commercial applications of RTD thermometers, the relationship between resistance and temperature is given by the following equations.
An operating temperature is the allowable temperature range of the local ambient environment at which an electrical or mechanical device operates. The device will operate effectively within a specified temperature range which varies based on the device function and application context, and ranges from the minimum operating temperature to the maximum operating temperature (or peak operating ...
In the table below are Seebeck coefficients at room temperature for some common, nonexotic materials, measured relative to platinum. [8] The Seebeck coefficient of platinum itself is approximately −5 μV/K at room temperature, [9] and so the values listed below should be compensated accordingly. For example, the Seebeck coefficients of Cu, Ag ...
The typical operating temperature range of a thermistor is −55 °C to +150 °C, though some glass-body thermistors have a maximal operating temperature of +300 °C. Thermistors differ from resistance temperature detectors (RTDs) in that the material used in a thermistor is generally a ceramic or polymer, while RTDs use pure metals.