High-temperature thermocouples are specialized temperature sensors designed for measuring temperatures in high-temperature industrial scenarios, with core features including high heat resistance and unique structural design.

Working Principle
Based on the Seebeck effect (thermoelectric effect), a circuit is formed by two different metal conductors, and temperature is detected by measuring the voltage signal generated by the temperature difference.
Main Types
Tungsten-Rhenium Thermocouples: Withstand temperatures up to 2000-2400°C, offering good linearity and reliable thermal stability, suitable for extreme environments such as metallurgy and nuclear reactors.
Composite Tube High-Temperature Thermocouples: Utilize wear-resistant protective tubes and surface modification technology, with a measurement range of 0-1280°C, suitable for flowing powder scenarios like cement clinker and petrochemical industries, with a service life of 1-2 years.
Platinum-Rhodium Thermocouples: Withstand temperatures up to 1800°C, demonstrating stability in oxidizing atmospheres, commonly used for high-temperature industrial temperature measurement.
Application Scenarios
Metallurgy, aerospace, nuclear industries, and other scenarios requiring extremely high heat resistance
Petrochemical, fluidized bed boilers, and other environments with high-temperature corrosion and severe wear
Low to medium-temperature industrial temperature measurement (e.g., scenarios below 500°C)
Technological Development
The latest technologies improve temperature measurement accuracy and durability by optimizing protective tube materials (such as silicon carbide, ceramic coatings) and intelligent compensation algorithms. Some models can achieve ±0.2°C accuracy and reduce wear.