The classification of the thermometer and its working principle

Thermometer, can be seen everywhere in our life, it is mainly used to measure the temperature in the various environment, according to its working principle, we can put the thermometer into glass rod thermometer, gas thermometer, solar thermometer and so on. Today we will introduce their works. Glass rod thermometer is made by using the properties of liquid heat bilges cold shrink. It commonly used liquid mercury, kerosene and alcohol as the display medium, which is so called the mercury thermometer, kerosene and alcohol thermometer thermometer. Gas thermometer, the use of certain properties of gases, Such as the volume or pressure) With temperature change characteristics, generally made of hydrogen and nitrogen. This kind of thermometer with high accuracy, wide measuring range, used for precision measurement. Solar thermometer, is a use of solar energy and provide accurate temperature indicating wired sensors. It is the light level is higher than 100 lux show, when the light levels drop, using the backup battery to provide power to continue to display circuit. It display material generally is LCD.