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Title: Ternperature Measurement Methods On Orifice Meter Installations And Resulting Effect On Measurement
Author: Charles G. Fellows
Source: 1939 Appalachian Gas Measurement Short Course
Year Published: 1939
Abstract: There are several practical methods used for the determination of the temperature of flowing fluids. These methods depend upon physical changes created by temperature changes, examples of which are as follows: 1. The volumetric expansion of liquids is directly proportional to temperature. 2. For volatile liquids there is only one vapor pressure for a given temperature. 3. Under a condition of constant volume, the pressure of a gas is directly proportional to the absolute temperature. 4. The resistance of electrical conductors varies dierctly with the temperature (the resistance thermometer). 5. When the junction of two dissimilar metals - a thermocouple - is heated, the resulting generated voltage is proportional to temperature.

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