The principle of glass liquid thermometer is used in a transparent glass thermal bubble and heat within the capillary liquid varies with temperature measured medium heat bilges cold shrink to measure the effect of temperature. The main characteristic of glass liquid thermometer is of simple structure, direct reading and easy to use, cheap, wide temperature range, etc. , so widely used by people in daily life, industrial and agricultural production, teaching and scientific research. Of glass liquid thermometer according to thermal bubble and thermal fluid column assumes the Angle can be divided into straight and Angle thermometer, according to the structure can be divided into external standard thermometer and internal standard thermometer in two forms. Of glass liquid thermometer with its liquid mercury are so common, alcohol and kerosene. For silver in color, mercury, alcohol and kerosene to red or blue. In the melt on the boiling point, mercury ( - 33C~357C) Alcohol ( - 117C~78C) , kerosene ( - 50C~80C) , according to the measurement of temperature, choose suitable thermometer.
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