Product Overview

Noble Metal Thermocouples — Type R, S & B

Type R, S, and B noble-metal thermocouples for furnace, heat treat, aerospace, and calibration-critical programs.

Noble-Metal Probe Protection Strategy

Noble-metal builds are specified around the protected tip, ceramic insulation system, and contamination control needed for furnace and heat-treat service.

Noble-metal thermocouple assembly with ceramic protection tube, stainless fitting, and connection head

Protected Ceramic-Tip Style

Use this protected-tip geometry when high-temperature stability and contamination control matter more than compact package size.

Noble Metal Assembly Types

Contamination Sensitivity

Noble metal thermocouple wire is extremely sensitive to contamination from metallic vapors, carbon, sulfur, hydrogen, and silicon. Thermometrics uses dedicated handling procedures, dedicated tooling, and protective packaging to prevent contamination during manufacturing. Alumina insulation (not silica) is specified for all noble metal assemblies to prevent SiO₂ reduction at the junction.

Calibration & Recalibration

Initial calibration: NIST-traceable and aligned to ITS-90.
AMS 2750 interval for Type R/S: annually or as used.
Typical Type S uncertainty: ±0.3°C at 1000°C.
Repair and recalibration: available under AS9100D-controlled processes.

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Noble Metal Thermocouples — Type R, S & B