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Platinum-Rhodium Assembly Thermocouple
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.
Key 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.
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.
Key Specifications
| Item | Available Options |
|---|---|
| Thermocouple Type | S-Type / R-Type / B-Type platinum-rhodium |
| Protection Tube | 99% alumina ceramic |
| Probe Diameter | Custom according to protection tube and installation requirements |
| Probe Length | Custom insertion length available |
| Mounting | Threaded / Flange |
| Thread | M16×1.5 / M20×1.5 / M27×2; other sizes available |
| Flange | DN25 / DN40 / DN50; ANSI B16.5 custom available |
| Probe Shape | Straight / L-Type right-angle custom |
| Wiring | Dedicated thermocouple extension or compensation wire |
| Accuracy | IEC 60584-1 Class 2 standard; Class 1 available depending on type and application |
Temperature Range
| Type | Recommended Long-Term Operation | Typical Use |
|---|---|---|
| S-Type | Up to about 1300°C | Furnaces and kilns |
| R-Type | Up to about 1400°C | High-temperature industrial furnaces |
| B-Type | Up to about 1500°C | Very high-temperature processes |
Actual operating temperature depends on thermocouple type, ceramic protection tube, atmosphere, installation conditions, and measurement environment.
Installation
- Install the threaded or flange mounting assembly on the furnace or equipment connection.
- Insert the ceramic protection tube to the required measurement position.
- Connect the dedicated S-Type, R-Type, or B-Type wiring to a compatible temperature instrument.
- Select a suitable probe length to keep the junction box away from excessive heat.
- 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.
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 Guides
Request OEM 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.
Amy – Sales
Email:
Amy-Easewise@tzheater.com
WhatsApp:
+86 188 8318 8154
Hanna – Sales
Email:
Hanna-Easewise@tzheater.com
WhatsApp:
+86 178 5163 6811
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