Kerosene thermometer - — One of the commonly used liquid thermometer

Kerosene thermometer, mercury thermometer and alcohol thermometer is more common in production and living of three kinds of liquid thermometer, the three kinds of thermometer is named according to the liquid inside the glass bulb. The structure of the three is the same, are made by glass bulb, glass tube, and the scale of the three parts, working principle and basic consistent, all is the use of glass bubble liquid within the working principle of heat bilges cold shrink. Kerosene thermometer temperature range is about - 30 ℃ ~ 150 ℃, so the temperature of the material is mainly used for measuring temperature is higher, and the main is liquid. No matter what the thermometer, there are some matters needing attention when using, take a look at below the use of kerosene thermometer matters needing attention. Use the first thing is to choose the right of the thermometer thermometer, because of the thermometer is not appropriate, may not be able to measure the temperature, may also damage the thermometer. So it's best to estimate the temperature of the object to be tested, with larger thermometer temperature measurement range, and then choose the suitable thermometer. When using a thermometer temperature, must want to let the heat of the thermometer with a good contact with the object to be tested. If the measurement is the temperature of the liquid, thermal bubble should all immersed in a liquid, but not into the container bottom, wall and because the temperature of the container often have difference with holding the temperature of the liquid. Reading is one of the most important step, if not master the reading method, then it is read out accurate numerical. When reading, therefore, have to wait the liquid level height in thermometer changes can be performed, and thermometer can't leave, the object to be tested the line of sight with hydraulic cylinder is flat. Finally, remember that thermometer can not be used as a stirrer, because a carelessly thermal bubble touch will be broken. And because the kerosene thermometer is different from mercury thermometer, can't jilt, before and after the use is not allowed to avoid reading. In general, kerosene thermometer is a relatively stable temperature measuring instruments, to scientific rigour of measured data, and the mercury thermometer, used in our daily life, work more widely.