What is a kerosene thermometer glass tube?

In industrial thermometer, such as kerosene, alcohol thermometer thermometer, mercury thermometer. The kerosene thermometer is the most common to the production. Kerosene thermometer work substance is kerosene, its boiling point is generally higher than 150 ℃, below the freezing point 30℃。 So a measure of the kerosene thermometer range is about - 30℃～150℃。 Because of the boiling point of alcohol is 78 ℃, freezing point is - 117 ℃, the alcohol thermometer can lower than kerosene thermometer measured temperature, but it cannot determine the above 78 ℃ temperature. - is the scope of mercury thermometer 39 degrees Celsius & ndash; 357 degrees Celsius. Currently on the market to sell more household temperature meter for kerosene thermometer. Its degree value is bigger, more is 1 ℃, so not able to do precise measurement. Kerosene thermometer note editor: one, the first thing to choose suitable thermometer temperature measuring range, to prevent high temperature object to be tested, liquid column will burst thermometer. If unable to estimate the temperature of the object to be tested, it should be with larger thermometer temperature measurement range, and then choose the appropriate thermometer, and make it minimum degree can accord with the requirement of the experimental accuracy. To reduce the influence of thermometer on the experiment system for experiment system should have enough heat capacity, so that more accurate results are obtained. Second, in the temperature measurement, must make the temperature of the thermometer with a good contact with the object to be tested. When measuring the temperature of the fluid, thermal bubble should all immersed in a liquid, and not into the container bottom, wall ( Because of the temperature of the container with cheng fang liquid temperature difference) 。 Three, in reading, want to stay in the thermometer liquid level height changes can be performed, and thermometer can't leave, the object to be tested the line of sight of people want to hydraulic cylinder is flat. 5 ℃. Generally do not need to read less than the minimum scale numerical estimate. Fourth, the thermometer can not be used as a stirrer, lest meet thermal bubble. Should use the thermometer outside wall with a soft cloth wipe up and handle with care in the box, avoid knock against. Because kerosene thermometer is different from mercury thermometer, can't jilt, before and after use to avoid reading is not allowed. Kerosene thermometer is commonly used in industrial production, family life and laboratory, is a kind of cheap, easy to use, simple structure of the thermometer, and the use of a wide range.