Introduction of bimetallic surface thermometer

Bimetallic surface thermometers have been widely used in machinery, metallurgy, energy and defense sectors. For example: the temperature measurement of various metal surfaces such as castings, forgings, gas pipes, steam pipes, and furnace walls in heat treatment.

The material of the bimetallic surface thermometer: stainless steel SS304 shell, aluminum watch brand, magnet. It works by the principle of thermal expansion and contraction of the bimetallic sensor. The spring or magnet at the bottom of the thermometer touches the measured metal surface and reads. The measurement range of this kind of surface bimetal thermometer can be from 30C to 500C, and the accuracy can be +/-3%. For some occasions where accuracy requirements are not too high, it can be regarded as a cheap and beautiful thermometer.

Features:

The magnet thermometer displays temperature on site, which is intuitive and convenient; safe and reliable, long service life, and fast reading.

Precautions for use:

The magnet thermometer can't be adsorbed on stainless steel. Please pay attention to the installation of the surface temperature sensor. It will determine the accuracy of the surface temperature measurement. In addition, pay attention to cleaning and inspection when using, and regularly check the measured value.

Service Introduction:

This product is used in pipelines, chemical equipment and other equipment to measure the surface temperature. It is a special thermometer for pipelines.

The difference between radial and axial bimetal thermometers:

The principle of the bimetal thermometer is to use a threaded thermal bimetal as a temperature sensing device and install it in a protective sleeve. One end is fixed, called the fixed end, and the other end is connected to a thin shaft. Called the free end. There is a pointer on the free end spool. When the temperature changes, the free end of the temperature sensing device rotates accordingly, driving the pointer on the thin shaft to produce an angle change, and the corresponding temperature is indicated on the dial. Common bimetallic thermometers include radial bimetallic thermometers, axial bimetallic thermometers and universal bimetallic thermometers.

The biggest difference between radial and axial bimetal thermometers is that the connection direction of the meter head and the temperature sensor is different. Do you know why these two are made separately? In fact, as we all know, bimetal thermometers are used in a wide range of fields, and the installation environment is also different. This requires more on the shape of bimetal thermometers, so there are three types of connections: radial, axial, and universal. the way. Since the reading of the radial bimetal thermometer is relatively convenient and cost-effective, there are more radial bimetal thermometers in China.

Why is the insertion depth of a bimetal thermometer so important?

The bimetal thermometer is an on-site detection instrument for measuring low and medium temperatures. It can directly measure the temperature of liquid, steam and gaseous media in the range of -40℃-+500℃ in various production processes. So it is widely used in industry, petroleum, chemical industry, heating system, pipeline, water heater, incubator, etc.

We all know that bimetal thermometers are mainly used to measure the temperature of the measured medium, so accuracy is very important. In fact, the insertion depth of the bimetal thermometer is as important as the accuracy. Because even if its accuracy is very accurate, but the insertion depth is incorrect (improper use), it is impossible to measure the accurate temperature. Generally, there are two factors that affect the insertion depth of the bimetal temperature. The first is the range of measuring temperature, because the measured temperature range determines the length of the bimetallic sensor (the bimetallic sensor is installed at the bottom of the temperature sensing tube). Generally speaking, from the end of the temperature sensing tube, at least 40MM, that is, a length exceeding 40MM is all right. The second one is related to the installation method of bimetallic thermometers. For example, WSS series bimetallic thermometers used in pipelines. If connecting bases or flanges are installed on the pipelines, the lengths of these accessories must be included.