What is the working principle and usage method of industrial thermometer
With the development of science and technology and the needs of modern industrial technology, temperature measurement technology is also constantly improved and enhanced. As the range of temperature measurement is getting wider and wider, according to different requirements, temperature measuring instruments with different needs are manufactured. Can accurately judge and measure temperature. The design is based on the phenomena of thermal expansion and contraction of solids, liquids, and gases affected by temperature. There are kerosene thermometers, alcohol thermometers, mercury thermometers, gas thermometers, resistance thermometers, thermocouple thermometers, radiation thermometers, light thermometers, bimetal thermometers and other thermometers for us to choose from, but we must pay attention to the correct use method and understand the temperature measurement The relevant characteristics of the instrument, if improperly operated, will directly affect the accuracy and life of the instrument.
Working principle of industrial thermometer:
Simply put, industrial thermometers have been designed and manufactured according to different purposes. The basis of its design is: using the phenomenon of thermal expansion and contraction of solids, liquids and gases affected by temperature; under the condition of constant volume, the pressure of gas (or steam) changes due to different temperatures; the role of thermoelectric effect; Changes in temperature; effects of heat radiation, etc. Any physical property of all substances, as long as it has a monotonous and significant change with the change of temperature, can be used to mark the temperature and make a thermometer.
The commonly used digital thermometer uses a temperature sensor to convert (temperature) into a digital signal, and then displays the temperature in digital form through a display (such as liquid crystal, digital tube, LED matrix, etc.), which can quickly and accurately measure the high value of human body temperature Compared with the traditional mercury thermometer, it has the advantages of convenient reading, short measurement time, high measurement accuracy, memory and prompt sound, etc., especially the digital thermometer does not contain mercury, which is harmless to the human body and the surrounding environment, especially suitable for hospitals , home use.
Infrared thermometer usage skills:
When using a thermometer to measure the temperature of a liquid, the correct method is as follows:
1. First observe the range, division value and 0 point, and the temperature of the measured liquid cannot exceed the range;
2. The glass bubble of the thermometer is completely immersed in the liquid to be measured, and do not touch the bottom or wall of the container;
3. Wait for a while after the glass bulb of the thermometer is immersed in the liquid to be tested, and wait for the reading of the thermometer to be stable before reading;
4. When reading, the glass bulb of the thermometer should remain in the liquid, and the line of sight should be level with the upper surface of the liquid column in the thermometer.
