Platinum-Rhodium & Thermocouple Alloys
Precision Noble Metal Alloys for High-Temperature Measurement
Accurate temperature measurement depends on more than sensor design. It begins with the material itself.
Noble-metal thermocouples are specified for high-temperature environments where base-metal thermocouples cannot maintain long-term accuracy. Even minor variations in alloy composition or contamination during manufacturing can affect thermoelectric output, causing calibration drift and measurement errors.
Sigmund Cohn Corp. manufactures precision platinum and platinum-rhodium thermocouple wire with exceptional compositional control and manufacturing consistency to ensure reliable performance in demanding thermal environments throughout the sensor's service life.
Standard Thermocouple Types
| Type | Composition | Typical Application |
|---|---|---|
| Type S | Pt / 10% Rh vs. Pt | Laboratory standards and high-temperature measurement |
| Type R | Pt / 13% Rh vs. Pt | Industrial process control |
| Type B | Pt / 30% Rh vs. Pt / 6% Rh | Ultra-high-temperature measurement |
Our thermocouple materials are manufactured to recognized calibration standards including:
Available product forms include precision wire, ultra-fine wire and ribbon, manufactured to exacting dimensional and metallurgical specifications.
Benefits
- Stable thermoelectric performance
- Exceptional oxidation resistance
- Long service life
- Excellent calibration stability
- Consistent manufacturing quality
- Precision alloy composition
Typical Applications
- Industrial furnaces
- Heat treatment equipment
- Semiconductor manufacturing
- Aerospace engines
- Scientific and laboratory instrumentation
- Power generation
- Process control systems
Whether you're developing a high-temperature sensor, qualifying thermocouple materials, or optimizing measurement accuracy, our engineering team can help identify the right alloy, wire diameter, calibration standard, and manufacturing solution for your application. For resistance-based measurement, see our RTD materials.
Contact Sigmund Cohn Corp. to discuss your thermocouple wire requirements or request a quote.