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PtRh13-Pt R-Type Thermocouple Ultra-Precise High-Temp Sensing & Steady Thermal Response
Product Description
Type R Thermocouple Wire
Product Overview
Type R thermocouple wire is a high-precision precious metal thermocouple composed of a platinum-rhodium 13% alloy (positive leg) and pure platinum (negative leg). It belongs to the platinum-rhodium thermocouple family, offering superior stability and accuracy in high-temperature environments, especially in the range of 1000°C to 1600°C. Compared to Type S thermocouples, it has a higher rhodium content in the positive leg, providing enhanced performance in long-term high-temperature applications.
Standard Designations
- Thermocouple Type: R-type (Platinum-Rhodium 13-Platinum)
- IEC Standard: IEC 60584-1
- ASTM Standard: ASTM E230
Key Features
- High-Temperature Stability: Long-term operating temperature up to 1400°C; short-term use up to 1700°C
- Superior Accuracy: Class 1 tolerance of ±1.5°C or ±0.25% of reading (whichever is larger)
- Low Drift Rate: ≤0.05% thermoelectric potential drift after 1000 hours at 1200°C
- Oxidation Resistance: Excellent performance in oxidizing and inert atmospheres (avoid reducing environments)
- Higher Thermoelectric Power: Generates 10.574 mV at 1500°C (reference junction at 0°C)
Technical Specifications
| Attribute | Value |
|---|---|
| Wire Diameter | 0.2mm, 0.3mm, 0.5mm (tolerance: -0.015mm) |
| Thermoelectric Power (1000°C) | 7.121 mV (vs 0°C reference) |
| Long-Term Operating Temperature | 1400°C |
| Short-Term Operating Temperature | 1700°C (≤20 hours) |
| Tensile Strength (20°C) | ≥130 MPa |
| Elongation | ≥25% |
| Electrical Resistivity (20°C) | Positive leg: 0.24 Ω·mm²/m; Negative leg: 0.098 Ω·mm²/m |
Chemical Composition (Typical, %)
| Conductor | Main Elements | Trace Elements (max, %) |
|---|---|---|
| Positive Leg (Platinum-Rhodium 13) | Pt:87, Rh:13 | Ir:0.02, Ru:0.01, Fe:0.003, Cu:0.001 |
| Negative Leg (Pure Platinum) | Pt:≥99.99 | Rh:0.003, Ir:0.002, Fe:0.001, Ni:0.001 |
Product Specifications
| Item | Specification |
|---|---|
| Length per Spool | 5m, 10m, 20m, 50m (precious metal material) |
| Surface Finish | Annealed, mirror-bright (no oxide layer) |
| Packaging | Vacuum-sealed in argon-filled containers to prevent contamination |
| Calibration | NIST-traceable with certificate of thermoelectric potential |
| Custom Options | Cut-to-length, special cleaning for ultra-high purity applications |
Typical Applications
- Aerospace engine testing (high-temperature combustion chambers)
- High-precision industrial furnaces (sintering of advanced ceramics)
- Semiconductor manufacturing (silicon wafer annealing)
- Metallurgical research (superalloy melting point testing)
- Glass fiber production (high-temperature furnace zones)
We also supply R-type thermocouple probes, connectors, and extension wires. Due to the high value of precious metals, free samples are available in limited lengths (≤1m) upon request, with detailed material certificates and impurity analysis reports.
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