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Product
Explosion-Proof RTD Series
- Product details
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Features: Explosion-proof design suitable for hazardous locations, high measurement accuracy; No compensation wire required, cost-saving
Applications: Explosion-proof environments such as petrochemical and chemical industries, directly measure the temperature of liquid, steam, gas media and solid surfaces within -200℃ ~ 500℃ in production sites with hydrocarbons and other explosives.
Working Principle: Flameproof RTD adopts the gap flameproof principle, with a high-strength junction box to seal all parts that may generate sparks, arcs and dangerous temperatures. When an explosion occurs in the cavity, the flame is extinguished and cooled through the joint surface gap, preventing the flame and high temperature from spreading outside the cavity.
Temperature Measuring Range: -200°C ~ +500°C (varies by specific product)
Mounting Types: No fixed device, fixed thread, movable flange, fixed flange, flexible pipe joint type, fixed tapered thread type, straight pipe joint type
Junction Box Type: Explosion-proof
Temperature Sensing Element Material: Platinum, Copper
Product Type Features Applications Explosion-proof Fixed Thread RTD Combined explosion-proof and threaded fixing Fixed installation in explosion-proof environments Explosion-proof Fixed Flange RTD Explosion-proof design with flange connection Flange connection in explosion-proof environments Explosion-proof Flexible Pipe Joint RTD Explosion-proof design with movable joint Flexible installation in explosion-proof environments Explosion-proof Straight Pipe Joint RTD Explosion-proof design with straight pipe joint Pipeline connection in explosion-proof environments
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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.
