Electric contact bimetallic thermometer is a commonly used industrial temperature measuring instrument that uses the principle of bimetallic plates to achieve temperature measurement. It consists of electrical contacts, bimetallic strips, housing, and connecting wires.

The basic principle of an electric contact bimetallic thermometer is to utilize the difference in deformation between two metal materials with different coefficients of thermal expansion under temperature changes. Usually, these two materials are bonded or welded together to form a composite consisting of two layers. When the composite is exposed to different temperature environments, relative displacement occurs between the two materials due to their different coefficients of thermal expansion.

One of the materials is in close proximity to the electrical contact (electrical contact), and when relative displacement occurs, it will cause the connected contact to open or close. Reflecting temperature changes in the tested medium or environment by detecting changes in the contact state.

The following are the main features and advantages of electric contact bimetallic thermometers:

1. Simple and reliable: The electric contact bimetallic thermometer has a simple structure, reliable use, and high anti-interference ability. Due to the absence of electronic components, it is not easily affected by electromagnetic interference.

2. Quick response: The bimetallic structure allows temperature changes to be quickly sensed and converted into changes in contact state, with a fast response time.

3. High temperature measurement range: Electric contact bimetallic thermometers are suitable for a wide temperature range, including low to high temperature environments. Generally, it can cover temperatures ranging from -200 ° C to+500 ° C or higher.

4. Corrosion resistance: Due to the use of corrosion-resistant materials such as stainless steel, electric contact bimetallic thermometers have good corrosion resistance and can maintain stable operation in harsh media.

5. Easy installation: The electric contact bimetallic thermometer is easy and convenient to install, and is relatively small and lightweight, making it easy to install on various equipment and pipelines for real-time monitoring.

6. High cost-effectiveness: Compared to other types of temperature sensors such as thermocouples or thermistors, electric contact bimetallic