Gas thermometer

A gas thermometer measures temperature by the variation in volume or pressure of a gas. One common apparatus is a constant volume thermometer. It consists of a bulb connected by a capillary tube to a manometer. The bulb is filled with a gas such that the volume of the gas in the bulb remains constant. The volume is related to temperature by k, known as Charles's Law . The pressure of the gas in the bulb can be obtained by measuring the level difference in the two arms of the manometer. Gas thermometers are often used to calibrate other thermometers.

==History==

Translation of "Gas thermometer"

German: Gasthermometer, Spanish: Termómetro de gas, Italian: Termometro a gas, Russian: Газовый термометр, Slovak: Plynový teplomer, Slovenian: Plinski termometer.