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Product
Assembled Thermocouple
- Product details
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Models: WRN, WRM, WRE, WRF, WRC
Features: Easy assembly, replacement; spring-loaded sensor, good anti-vibration; wide measuring range; high mechanical strength, good pressure resistance.
Application:Used with display meters, recorders, computers to measure 0°C ~ 1300°C for liquids, steam, gases and solid surfaces.
Working Principle: Same as above: thermoelectric effect based on two different conductors.
Temperature Range: 0°C ~ 1300°C (varies by model)
Mounting Types:No fixed device, fixed thread, movable flange, fixed flange, flexible union, fixed thread cone, straight union
Connection Head Types:Waterproof, jet-proof
Sensor Materials:NiCr-NiSi, NiCrSi-NiSi, NiCr-CuSi, Cu-CuNi, Fe-CuNiProduct Type Features Applications Thermocouple Without Fixed Device No fixed device, high flexibility Suitable for occasions requiring mobile or temporary installation Fixed Thread Type Thermocouple Fixed by thread, firm and stable installation Suitable for temperature measurement of pipelines and vessels Fixed Tapered Thread Type Thermocouple Tapered structure design, excellent sealing performance Suitable for temperature measurement of high-pressure vessels Union Fitting Type Thermocouple Movable joint design, adjustable insertion depth Suitable for pipelines with different wall thicknesses Straight Fitting Type Thermocouple Adopts straight pipe fitting connection Suitable for temperature measurement of standard pipelines
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Q
What is a thermocouple?
A
Thermocouples are the preferred solution for extreme temperature applications. They consist of two dissimilar metal wires joined at the measuring end, generating a voltage proportional to the temperature difference.
Working Principle: When two different metals are connected, the thermoelectric effect produces a voltage at the junction. This voltage increases with rising temperature, allowing measurement via reference tables.
Key Advantages:
• Temperature Range: -270°C to 2300°C (depending on type)
• Fast Response Time (typically 0.1–10 seconds)
• Robust Construction, vibration-resistant
• Relatively Low Cost
• No External Power Required
Q
What is the difference between RTD and thermocouple?
A
• RTD (Resistance Temperature Detector): Based on the principle that a metal conductor's resistance increases with temperature, it converts resistance measurements into temperature readings.
• Thermocouple: Operates on the Seebeck effect, where two dissimilar metals in contact generate a thermoelectric voltage proportional to temperature differences.
Features
• RTD: High accuracy, stable signal, excellent linearity, ideal for low to medium temperatures.
• Thermocouple: Simple structure, fast response, high-temperature resistance, wide measurement range.
Pros & Cons
• RTD Pros: High precision, strong anti-interference, reliable low-temperature performance.
Cons: Limited upper temperature range, bulkier size, slightly slower response.
• Thermocouple Pros: Broad temperature range, high-temperature tolerance, rapid response, suitable for moving/surface measurements.
Cons: Lower accuracy at low temperatures, requires cold junction compensation, weaker signal prone to interference.
