These fixed assembly thermocouples are suitable for high-temperature applications where stable measurement and ceramic protection are required. Probe length, mounting, wiring, and protection tube dimensions can be customized for different furnace and process installations.

For construction comparison, see our Sheathed vs Assembly Thermocouple guide, or use our Thermocouple Types Selection Guide to compare different thermocouple types.

Platinum-Rhodium Thermocouple Types

• S-Type (PtRh10-Pt): Suitable for general high-temperature furnaces and kilns, with recommended long-term operation up to about 1300°C.
• R-Type (PtRh13-Pt): Provides good stability for high-temperature industrial furnace applications, with recommended long-term operation up to about 1400°C.
• B-Type (PtRh30-PtRh6): Designed for very high-temperature processes, with recommended long-term operation up to about 1500°C.

For other thermocouple constructions and temperature ranges, see our Industrial Thermocouples range.

Platinum-Rhodium Assembly Thermocouple Features

• Platinum-rhodium sensing element for demanding high-temperature measurement.
• 99% alumina ceramic protection tube for high-temperature furnace and kiln environments.
• Fixed assembly structure with insertion depth defined during manufacturing.
• Threaded or flange mounting for fixed industrial installation.
• Straight or L-Type probe configurations available.
• OEM customization for probe length, diameter, mounting, flange, wiring, and other requirements.

Platinum-Rhodium Thermocouple Applications

• Heat-treatment and annealing furnaces
• Ceramic sintering kilns
• Glass melting furnaces
• Metallurgical high-temperature furnaces
• Laboratory high-temperature furnaces
• Industrial heating and thermal processing equipment
• High-temperature process monitoring

For broader industrial temperature measurement requirements, see our Thermocouple Applications page.

Platinum-Rhodium Assembly Thermocouple Specifications

Platinum-Rhodium Thermocouple Temperature Range

Actual operating temperature depends on thermocouple type, ceramic protection tube, atmosphere, installation conditions, and measurement environment.

Platinum-Rhodium Thermocouple Installation

1. Install the threaded or flange mounting assembly on the furnace or equipment connection.
2. Insert the ceramic protection tube to the required measurement position.
3. Connect the dedicated S-Type, R-Type, or B-Type wiring to a compatible temperature instrument.
4. Select a suitable probe length to keep the junction box away from excessive heat.
5. Handle the alumina ceramic protection tube carefully to avoid impact or sudden mechanical stress.

The probe insertion depth is fixed during manufacturing and is not field adjustable.

Thermocouple Accuracy Standard

Platinum-rhodium assembly thermocouples are available with IEC 60584-1 Class 2 accuracy as standard. Class 1 is available depending on thermocouple type and application requirements. See the official IEC 60584-1 thermocouple standard for reference.

Related Thermocouple Products

• Industrial Thermocouples
• Sheathed Thermocouple
• Threaded Assembly Thermocouple
• Flange Mounted Assembly Thermocouple
• Explosion-Proof Assembly Thermocouple
• Wear-Resistant Assembly Thermocouple
• Waterproof Anti-Corrosion Assembly Thermocouple

Related Thermocouple Guides

• Sheathed vs Assembly Thermocouple
• Thermocouple Types Selection Guide
• Thermocouple Applications

Request OEM Platinum-Rhodium Thermocouple Support

Send us your thermocouple type, probe diameter and length, ceramic protection tube, mounting specification, wiring requirements, and application temperature. Drawings, photos, and existing samples are welcome.