Industrial Pt100 Pt1000 RTD Sensor (Class A Precision)
For applications where accuracy and long-term stability are critical, the Hongtai Industrial Pt100/Pt1000 RTD (WZ / WZPK Series) is the superior choice over standard thermocouples. Unlike thermocouples which generate voltage, this Resistance temperature detector measures the change in electrical resistance of a platinum element, offering unmatched linearity and repeatability in the -200°C to 500°C range.
Designed for precision process control, HVAC efficiency, and laboratory metrology, our RTD temperature probe assemblies feature high-purity platinum windings housed in rugged Stainless Steel 316 sheaths. We offer both standard Pt100 sensor class A (100Ω at 0°C) for industrial loops and Pt1000 sensor (1000Ω at 0°C) models for low-power and battery-operated IoT devices.
Key Technical Features & Benefits
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Superior Accuracy: Available in Class A, Class AA, and 1/3 DIN tolerances. While a standard thermocouple has an error of ±1.5°C or more, our Class A RTD offers an accuracy of ±0.15°C at 0°C.
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Lead Compensation: Standard 3 wire Pt100 connection eliminates measurement errors caused by lead wire resistance, ensuring that the controller reads the sensor temp, not the wire temp.
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Cryogenic to Medium Temp: Excellent stability for liquid nitrogen storage (-196°C) up to food ovens (250°C) and exhaust monitoring (500°C).
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Vibration Resistance: Our WZPK armored series uses compacted Magnesium Oxide (MgO) insulation (similar to MI cables) to protect the fine platinum wire from industrial vibration.
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Drift Free: Platinum elements resist aging and drift much better than base metal thermocouples, reducing recalibration frequency.
Technical Specifications (WZ/WZPK Series)
| Parameter | Specification | Notes |
| Product Type | Industrial Pt100/Pt1000 RTD | Assembly or Armored Cable |
| Element Type | Platinum (Pt) | Thin Film or Wire Wound |
| Resistance @ 0°C | 100Ω (Pt100), 1000Ω (Pt1000) | Cu50, Cu100 also available |
| Accuracy Class (IEC 60751) | Class B (±0.30°C), Class A (±0.15°C) | 1/3 DIN (High Precision) |
| Temp Range | -200°C to +500°C | Wire wound for wider range |
| Wiring System | 2-Wire, 3-Wire (Standard), 4-Wire | 4-Wire for Lab Reference |
| Sheath Material | SS304, SS316L | Corrosion Resistant |
| Diameter | 3mm, 4mm, 5mm, 6mm, 8mm | 6mm is Industry Standard |
| Process Connection | M27x2, 1/2″ NPT, G1/2″ | Fixed or Adjustable |
Pt100 vs. Pt1000: Which do I need?
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Pt100: The global industrial standard. Compatible with 99% of PLCs, PID controllers, and transmitters. Best for 3-wire or 4-wire circuits.
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Pt1000: Offers 10x higher resistance change per degree. This reduces the impact of lead wire resistance, making it ideal for 2-wire circuits often found in HVAC and refrigeration controllers, or where battery life is a priority (higher resistance = less current draw).
Application Scenarios
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Process Control: Chemical reactors where ±1°C can ruin a batch.
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HVAC & Building Automation: Chiller water temperature and air duct monitoring (often using Pt1000).
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Food & Beverage: Autoclaves and pasteurization tunnels requiring high-precision documentation.
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Cryogenics: LNG and Liquid Nitrogen/Oxygen tank monitoring.
FAQ
Q: Can I extend the lead wire myself?
A: Yes, but you must use shielded copper cable (not thermocouple wire). For 3 wire Pt100 connection, ensure all three extension wires are the exact same length and gauge to maintain accuracy.
Q: What is the max temperature?
A: Standard thin-film RTDs are good to 500°C. Above 500°C, the platinum film can degrade. For temperatures >600°C, we recommend switching to a Type K or Type N thermocouple.
Need higher temperatures? Check our Industrial Thermocouple Assemblies.
