High-temperature temperature sensors differ from general temperature sensors, as they are used in more stringent application environments, typically operating under high-temperature conditions. Due to the unique operating conditions, high-temperature temperature sensors have a more specialized construction and operate on a principle distinct from other temperature sensors. So, what is the working principle of high-temperature temperature sensors? Let's find out together below!
Sensor Designed with the Principle of Metal Expansion
Metals expand in response to changes in environmental temperatures, allowing sensors to signal this response in varying ways.
Dual Metal Sheet Sensor
The bimetallic strip is composed of two metals with different coefficients of expansion bonded together. As the environmental temperature changes, Material A expands more than the other metal, causing the strip to bend. The curvature of the bend can be converted into an output signal.
Dual-Metal Rod and Metal Tube Sensors
As environmental temperatures rise, metal tube lengths increase, while the lengths of non-expanding steel rods do not. This allows for the linear expansion of the metal tube to be transmitted due to the change in position. Conversely, this linear expansion can be converted into an output signal.
Sensor with Deformation Curve Design for Liquids and Gases
When the ambient temperature changes, both liquids and gases will undergo corresponding changes in volume.
Various types of structures can convert this expansion into positional changes, thereby generating positional change outputs.
Selecting High-Temperature Temperature Sensors: Notes
1. The size and accuracy requirements for the temperature measurement range.
2. Whether the environmental temperature of the object being tested needs to be recorded, alarmed, and automatically controlled, and whether it requires long-distance measurement and transmission.
3. Can the lag of the temperature sensing element adapt to the temperature measurement requirements in scenarios where the environmental temperature of the object being tested varies over time?
4. Can the size of the temperature sensing element be appropriately adjusted?
5. How to ensure price stability and facilitate usage?
6. The environmental conditions of the tested objects may affect the integrity of the temperature-sensing elements.
That concludes our introduction to the working principle of high-temperature temperature sensors. By now, do you have a fresh understanding of high-temperature temperature sensors? In today's highly developed industrial society, sensors are used everywhere, and the emergence of high-temperature temperature sensors has also made some harsh engineering detection tasks more convenient. As the level of temperature sensors rapidly advances, we can expect to see an increasing number of intelligent high-temperature temperature sensors in the future!
