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Hongtai WZP series thermal resistors are industrial-grade temperature-sensing components based on platinum (Pt100) elements, designed for precise, stable temperature measurement in harsh and demanding environments. Compliant with IEC 60751 and DIN EN 60751 standards, they are widely used in automotive, chemical, food processing, and machinery industries-delivering reliable performance where accuracy and durability are non-negotiable.
Core Models & Detailed Technical Specifications
The WZP series covers three mainstream models, each optimized for different installation and application scenarios. Key parameters are verified via third-party testing (CNAS-accredited labs) to ensure consistency.
| Parameter | WZP-130 (Axial Lead) | WZP-230 (Radial Lead) | WZP-430 (Flange Mount) |
|---|---|---|---|
| Temperature Range | -50°C ~ 420°C | -50°C ~ 500°C | -50°C ~ 600°C |
| Accuracy Class | Class A / Class B | Class A / Class B | Class A / Class B |
| - Allowable Error (Class A) | ±0.15°C (0°C);±0.3°C (100°C);±0.6°C (300°C) | Same as WZP-130 | Same as WZP-130 |
| - Allowable Error (Class B) | ±0.3°C (0°C);±0.6°C (100°C);±1.2°C (300°C) | Same as WZP-130 | Same as WZP-130 |
| Resistance at 0°C (R0) | 100Ω ±0.06Ω (Class A);100Ω ±0.12Ω (Class B) | Same as WZP-130 | Same as WZP-130 |
| Resistance Temperature Coefficient (α) | 0.003851 Ω/Ω/°C (IEC 60751 standard) | Same | Same |
| Probe Material | 316L stainless steel (Shore Hardness ≥ 200 HV) | 316L stainless steel / Inconel 600 (optional) | 316L stainless steel / Hastelloy C-276 (optional) |
| Probe Dimensions | Diameter: 3mm/4mm/5mm;Length: 20mm~200mm (customizable) | Diameter: 4mm/6mm;Length: 30mm~150mm (customizable) | Diameter: 6mm~12mm;Length: 50mm~300mm (customizable) |
| Insulation Material | High-purity alumina ceramic (耐温 ≤ 600°C) | Same as WZP-130 | High-purity magnesium oxide (MgO) (耐温 ≤ 800°C) |
| Lead Type | PTFE-insulated wire (2-core/3-core);Length: 0.5m~5m (customizable) | Silicone-insulated wire (2-core/3-core);Length: 0.3m~3m (customizable) | Fiberglass-sheathed cable (2-core/3-core);Length: 1m~10m (customizable) |
| Protection Level | IP65 (standard);IP68 (optional, for submersion) | IP65 (standard) | IP67 (standard);IP68 (optional) |
| Rated Power Dissipation | ≤ 5mW/°C (at 100°C) | ≤ 8mW/°C (at 100°C) | ≤ 10mW/°C (at 100°C) |
| Response Time (τ0.5) | ≤ 8s (in still air);≤ 2s (in flowing water) | ≤ 6s (in still air);≤ 1.5s (in flowing water) | ≤ 10s (in still air);≤ 3s (in flowing water) |
Core Product Features
1. Ultra-High Measurement Precision
Uses 99.99% high-purity platinum wire (vs. industry average 99.95%) for the sensing element, ensuring minimal resistance drift over long-term use. Class A models maintain ±0.15°C accuracy at 0°C-critical for automotive engine calibration and pharmaceutical temperature control.
Pre-calibrated across the full temperature range (-50°C ~ 600°C) via automated equipment, with each unit accompanied by a traceable calibration certificate.
2. Durability for Harsh Environments
316L stainless steel probe resists corrosion from chemicals (acids, alkalis) and salt spray-ideal for coastal chemical plants or food processing lines using cleaning agents. Optional Inconel 600/Hastelloy C-276 materials extend service life in high-temperature (≤ 600°C) and corrosive conditions.
High-density insulation (alumina ceramic/MgO) prevents moisture ingress. Testing shows insulation resistance remains >100MΩ after 1,000 hours of exposure to 95% relative humidity (30°C)-far exceeding industry standards.
3. Stable Performance in Extreme Temperatures
Optimized element structure reduces cold-temperature drift: at -30°C (typical of German or Northern European winters), drift stays <±0.2°C (vs. industry average ±0.35°C). Critical for outdoor piping or automotive cold-start temperature monitoring.
High-temperature stability up to 600°C (WZP-430) with no resistance degradation-suitable for industrial oven and heat treatment furnace applications.
4. Flexible Installation & Compatibility
Multiple mounting options (axial/radial leads, flange mount) fit diverse equipment layouts-from compact electronic enclosures (WZP-230) to large-diameter industrial pipes (WZP-430).
Lead wires (PTFE/silicone/fiberglass) are customizable in length and insulation type, compatible with global control systems (Siemens, Allen-Bradley, Schneider) via standard 2-core/3-core configurations.
5. Compliance & Quality Assurance
Meets CE (EN 61326-1 for EMC), RoHS 2.0 (restriction of hazardous substances), and ISO 9001 quality management standards. Technical dossiers (English/German/Spanish) are available for regional compliance (e.g., DIN EN 60751 for Europe, NOM for Mexico).
100% batch testing (resistance, insulation, accuracy) before shipment, with a 12-month warranty against manufacturing defects.
Typical Application Scenarios
Automotive: Engine cylinder block temperature monitoring, battery thermal management (EVs)
Chemical Industry: Pipeline temperature measurement, reactor temperature control
Food Processing: Oven baking temperature, refrigerated storage temperature tracking
Machinery: CNC machine tool spindle temperature, hydraulic system temperature sensing
Pharmaceutical: Sterilizer temperature validation, vaccine cold chain monitoring
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