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Product
Armored RTD Series
- Product details
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Model: WZPK, WZMK, WZEK, WZFK
Features:Short thermal response time to reduce dynamic error; Small diameter with unrestricted length; High measurement accuracy; Imported thin-film resistance element with reliable and stable performance.
Applications:Temperature measurement in industrial process control, usually matched with display instruments, recording instruments, electronic computers, etc. Directly measure the temperature of liquid, steam, gas media and solid surfaces within -200℃ ~ 500℃ in various production processes.
Working Principle:Armored RTD measures temperature based on the characteristic that the resistance of a substance changes with temperature. When the resistance value changes, the working instrument displays the temperature value corresponding to the resistance.
Temperature Measuring Range: -200°C ~ +500°C (varies by specific product)
Mounting Types:No fixed device, fixed ferrule thread, movable ferrule thread, fixed ferrule flange, movable ferrule flange
Junction Box Types: Spray-proof, waterproof, round plug-in, flat plug-in, compensation wire type
Product Type Features Applications Waterproof Armored RTD Waterproof design with IP65 ingress protection rating Humid environments Round Plug-in Armored RTD Round plug-in connection Scenarios requiring quick connection Flat Plug-in Armored RTD Flat plug-in connection Space-constrained environments Compensation Wire Type Armored RTD Integrated compensation wire Long-distance measurement
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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.
