High Temperature Thermocouples

General Notes

There are many arrangements of Noble Metal thermocouple assembles that utilize combinations of protecting tubes. thermocouple elements. terminate and mounting options. They are categorized into High Temperature Metal sheath (HTM), High Temperature Industrial (HTI), and Platinum Insulated Element (PIE) assemblies (see below). Noble metal thermocouples are relatively expensive units that are easily contaminated so proper protection from harmful atmospheres is required In order to get suitable service life from the assembly.

Platinum & Tungsten-Rhenium 24 ga. (.020) and 30 ga. (.010) thermocouple elements have welded junctions. Insulators are round double bore alumina. Thermocouple protection tubes are available in Alumina. Stainless Steel, lnconel, Molybdenum, Platinum, Platinum-Rhodium, Tantalum, and Titanium. All sheath assemblies are evacuated and back filled with inert gee to hinder contamination.

Noble Metal thermocouples tolerate higher temperatures and provide greater accuracy than base metal thermocouples. Typical application would include: let engines, rocket engines, turbines, exhaust gas sensing, glass manufacturing, heat treating, laboratory research, nuclear environments, power stations, vacuum furnaces, and more.


CALIBRATIONS

TIC TYPE

ELEMENT COMPOSITION

R

PLATINUM VS. PLATINUM 13% RHODIUM

S

PLATINUM VS. PLATINUM 10% RHODIUM

B

PLATINUM 30% RHODIUM VS. PLATINUM 6% RHODIUM

W-W26

TUNGSTEN VS. TUNGSTEN 26% RHENIUM
W5-W26 TUNGSTEN 5% RHENIUM VS. TUNGSTEN 26% RHENIUM
W3-W25 TUNGSTEN 3% RHENIUM VS. TUNGSTEN 25% RHENIUM



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