The principle and the advantages and disadvantages of glass thermometer

Speaking of thermometer, the first reaction is the thermometer, also is the glass rod thermometer, we said this is a lot of people know, but the principle of the glass rod a lot of people don't know, instrument with you today, the principle and the advantages and disadvantages of the thermometer, uncover everyone in the heart of doubt: because of temperature measuring dielectric coefficient of expansion and the boiling point and freezing point is different, so we common glass thermometer mainly has: kerosene thermometer, mercury thermometer, red pen water thermometer. Glass tube thermometer is the use of the principle of heat bilges cold shrink to realize the temperature measurement. He has the advantage of simple structure, easy to use, has relatively high accuracy and low price. Defect is measured on the floor and the precision is restricted by glass quality and temperature of medium. And cannot be far eastone, fragile. Above is the principle and the advantages and disadvantages of glass thermometer, you can choose according to their own needs suitable thermometer.