Type R Thermocouple
Platinum rhodium thermocouple material for clean high-temperature service
Type R is a noble-metal thermocouple type that uses Platinum 13% Rhodium as the positive leg and pure Platinum as the negative leg. It is used for clean high-temperature furnace, heat-treat, laboratory, and calibration-critical applications.
Thermometrics manufactures Type R thermocouple assemblies as noble-metal probes, ceramic protection-tube assemblies, furnace sensors, and custom high-temperature assemblies built around the process environment.
Common Type R RFQ details
Type R temperature range
Type R is commonly referenced for approximately -58°F to 2700°F (-50°C to 1480°C). The practical assembly rating depends heavily on atmosphere, protection tube material, insulation, mounting style, and contamination control.
Type R thermocouple material
Type R uses Platinum 13% Rhodium for the positive conductor and pure Platinum for the negative conductor. Because noble-metal thermocouples are sensitive to contamination, protection tube selection and process atmosphere matter.
Type R chart PDFs
When Type R is a strong fit
When to review alternatives
Type S is similar and commonly reviewed for high-temperature reference and furnace work. Type B may be reviewed for very high-temperature clean-air applications. Type K or Type N may be more economical where base-metal thermocouples are suitable.
Related thermocouple resources
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