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A thermocouple produces a temperature-dependent voltage as a result of the Seebeck effect, and this voltage can be interpreted to measure temperature. Thermocouples are widely used as temperature sensors. [1] Commercial thermocouples are inexpensive, [2] interchangeable, are supplied with standard connectors, and can measure a wide range of ...
Thermocouples have a range of −180 to 2,320 °C (−292.0 to 4,208.0 °F), [9] so for temperatures above 500 °C (932 °F) it is the contact temperature measurement device commonly found in physics laboratories.
The primary reason is "dynamic range" (a good thermistor usually has a narrow temperature range), ... Here is a list of the Omega thermocouple reference tables.
English: Type B,R,S thermocouples' reference functions, using NIST ITS-90 calibration curves, plus type C,D,G thermocouples' functions from OMEGA Inc.'s datasheet (note these are IPTS68 calibrations). Python source code can be found on File:Low_temperature_thermocouples_reference_functions.svg.
The output of a thermopile is usually in the range of tens or hundreds of millivolts. [7] As well as increasing the signal level, the device may be used to provide spatial temperature averaging. [8] Thermopile, composed of multiple thermocouples in series. If both the right and left junctions are the same temperature, voltages cancel out to zero.
OMEGA Engineering is an American instrumentation company headquartered in Norwalk, Connecticut, with its main factory in Swedesboro, New Jersey. [ 7 ] It has sales offices in the United Kingdom, Canada, Germany, China, Brazil, Singapore, Korea, Japan, and Mexico.
As commonly used for commercial applications of RTD thermometers, the relationship between resistance and temperature is given by the following equations. The relationship above 0 °C (up to the melting point of aluminum ~ 660 °C) is a simplification of the equation that holds over a broader range down to -200 °C.
In particular, the 1932 measurements may have incorrectly measured the Thomson coefficient over the range 20 K to 50 K. Since nearly all subsequent publications relied on those measurements, this would mean that all of the commonly used values of absolute Seebeck coefficient (including those shown in the figures) are too low by about 0.3 μV/K ...
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