Thermocouples, Temperature Probes
1. What are Thermocouples, Temperature Probes?
Thermocouples are temperature sensors based on the Seebeck effect. They consist of a closed circuit of two dissimilar conductors that generates a measurable voltage under a temperature gradient. Temperature probes are complete temperature measurement devices that integrate a thermocouple, a protective sheath, and a signal processing module, suitable for direct insertion into the measured medium.
2. What are the Technical Features of Thermocouples, Temperature Probes?
Wide Temperature Range: -200°C to 2300°C (depending on the material), covering extreme environmental requirements.
Fast Response: Micro-diameter thermocouples can achieve millisecond-level response, making them suitable for dynamic temperature monitoring.
Strong Environmental Adaptability: Resistant to high pressures and corrosive media (such as K-type thermocouples with stainless steel sheaths).
Cost-Effectiveness: Compared to RTDs (platinum resistance detectors), thermocouples offer a more affordable price in the high-temperature range.
3. What are the Typical Applications of Thermocouples, Temperature Probes?
Industrial Manufacturing: Process control for furnaces, reactors, injection molding machines, and other applications.
Energy: Boiler piping and turbine exhaust monitoring.
Research and Experimentation: Vacuum environments and plasma temperature measurement.
Automotive Electronics: Engine exhaust temperature sensing.
4. Selection Guide for Thermocouples, Temperature Probes
Thermocouple Types: K-type (general purpose), J-type (low temperature), S-type (high temperature).
Probe Structure: Armored (vibration-resistant), Ceramic Insulation (high voltage).
Signal Output: Analog voltage/digital output (e.g., RS485 interface).
5. Maintenance and Calibration Recommendations
Regularly check insulation resistance (>1MΩ);
Avoid using bare-wire thermocouples in reducing atmospheres;
Perform annual calibration using a standard blackbody furnace.