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Franklab
Platinum–Rhodium Wire，>99.99%
Platinum–Rhodium Wire，>99.99%
Regular price
$65.00 USD
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$65.00 USD
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Product Description
Platinum–Rhodium Wire (Pt–Rh Wire) | ≥99.99% Purity
High-Purity Platinum–Rhodium Alloy Wire for Thermocouples & High-Temperature Applications
FrankLab supplies Platinum–Rhodium (Pt–Rh) alloy wire with ultra-high purity and tightly controlled composition, widely used in high-temperature thermocouples, precision temperature measurement, electrochemical research, and advanced materials applications.
Platinum–Rhodium alloys combine the chemical inertness of platinum with the enhanced mechanical strength and high-temperature stability of rhodium, making them the industry standard for Type S, Type R, and Type B thermocouples.
Available Thermocouple Types
Type S Thermocouple Wire
•Composition: Pt–Rh 10% / Pt
•Standard: IEC / ASTM
•Typical maximum temperature: ~1600 °C
Type R Thermocouple Wire
•Composition: Pt–Rh 13% / Pt
•Standard: IEC / ASTM
•Typical maximum temperature: ~1600 °C
Type B Thermocouple Wire
•Composition: Pt–Rh 30% / Pt–Rh 6%
•Standard: IEC / ASTM
•Typical maximum temperature: ~1700–1800 °C
Available Diameters
Standard diameter options:
•0.10 mm
•0.20 mm
•0.30 mm
•0.40 mm
•0.50 mm
Other diameters can be manufactured upon request.
Standard Length Options
•100 mm (standard lab length)
Custom lengths available:
•1 cm
•10 cm
•1 m
•Coil supply
•Custom cut lengths
Key Features
•Ultra-high purity: ≥99.99%
•Excellent high-temperature stability
•Outstanding oxidation resistance
•Low drift at elevated temperatures
•Stable thermoelectric output
•Excellent mechanical strength at high temperature
•Suitable for long-term continuous operation
Technical Specifications
| Parameter | Specification |
| Material | Platinum–Rhodium Alloy |
| Purity | ≥99.99% |
| Thermocouple Types | Type S / Type R / Type B |
| Alloy Composition | Pt–Rh 10%, Pt–Rh 13%, Pt–Rh 30% / 6% |
| Form | Solid wire |
| Diameter Range | 0.10 – 0.50 mm |
| Standard Length | 100 mm |
| Surface Finish | Clean, smooth metallic |
| Maximum Operating Temperature | Up to 1800 °C (Type B) |
| Chemical Resistance | Excellent |
| Long-Term Stability | Excellent |
Typical Applications
Temperature Measurement
•Type S / R / B thermocouples
•High-precision temperature sensors
•Calibration standards
High-Temperature Research
•Furnaces
•Kilns
•Crystal growth
•Materials sintering
Electrochemical & Materials Research
•High-temperature electrochemical experiments
•Reference and probe components
•Noble-metal test electrodes
Industrial & Laboratory Use
•Metallurgy
•Glass industry
•Semiconductor research
Customization Options
FrankLab offers full customization support:
•Custom Pt–Rh ratios
•Custom diameters
•Custom lengths
•Matched thermocouple pairs
•Bulk supply
•OEM & private labeling (on request)
Packaging & Quality Control
•Clean, laboratory-grade packaging
•Individually packed or bulk packed
•Strict alloy composition control
Why Choose FrankLab
•Specialized in electrochemical & high-temperature materials
•Reliable supply of noble-metal alloys
•Deep understanding of thermocouple standards
•Flexible customization & technical support