Type B Thermocouple
Platinum rhodium thermocouple material for very high-temperature clean-air service
Type B is a noble-metal thermocouple type that uses Platinum 30% Rhodium as the positive leg and Platinum 6% Rhodium as the negative leg. It is used for very high-temperature furnace and process applications where the atmosphere is clean and compatible.
Thermometrics manufactures Type B thermocouple assemblies as noble-metal probes, ceramic protection-tube assemblies, furnace sensors, and custom high-temperature assemblies built around the process environment.
Common Type B RFQ details
Type B temperature range
Type B is commonly referenced for approximately 1475°F to 3270°F (800°C to 1800°C). The practical assembly rating depends heavily on atmosphere, protection tube material, insulation, mounting style, and contamination control.
Type B thermocouple material
Type B uses Platinum 30% Rhodium for the positive conductor and Platinum 6% Rhodium for the negative conductor. It is generally reviewed for clean high-temperature service and should be protected from reducing atmospheres and contamination.
Type B chart PDFs
When Type B is a strong fit
When to review alternatives
Type R or Type S may be reviewed for lower noble-metal high-temperature ranges. Type K or Type N may be more economical where base-metal thermocouples and the application environment are suitable.
Related thermocouple resources
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