Principle of explosion-proof bimetallic thermometer

Explosion proof bimetallic thermometer is a common industrial temperature measurement device that uses the thermal expansion properties of bimetallic sheets to measure temperature, and has characteristics such as high temperature resistance and corrosion resistance.

Explosion proof bimetallic thermometer is a common industrial temperature measurement device that uses the thermal expansion properties of bimetallic sheets to measure temperature, and has characteristics such as high temperature resistance and corrosion resistance.

　　

Principle:

　　

Composed of two metal sheets of different materials, such as iron and copper, which are welded or mechanically clamped together. When the temperature rises, due to the different thermal expansion coefficients of different metals, the length of the two metal sheets changes, causing the entire bimetallic sheet to bend. The current temperature can be calculated based on the degree of bending.

　　

Technical Specifications:

　　

1. Measurement range: The measurement range is usually between -200 ℃ and+700 ℃, but can also be customized according to application requirements.

　　

2. Accuracy: Accuracy depends on factors such as structural design, material selection, and processing technology, and can generally reach an accuracy of 0.5% to 1.5%.

　　

3. Response time: The response time is usually between a few seconds and tens of seconds, but can also be adjusted according to application requirements.

　　

4. Material selection: Material selection depends on its application environment. For example, for high-temperature environments, material combinations such as iron copper and iron nickel are generally used; For corrosive environments, corrosion-resistant materials such as stainless steel can be used.

　　

5. Safety: As explosion-proof bimetallic thermometers are commonly used in flammable and explosive environments, their safety is very important. Generally speaking, it needs to meet explosion-proof standards, such as Exia II CT6.

　　

6. Service life: The service life is influenced by various factors such as structural design, material selection, and usage conditions, and can generally reach more than 10 years.

　　

7. Maintenance: In order to ensure the measurement accuracy and safety of the explosion-proof bimetallic thermometer, regular maintenance is required, such as cleaning, calibration, and replacement of damaged parts.