Ceramic Thermocouple Insulators
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- Available in a Wide Range of Sizes
- Single Hole, Two Hole and Four Hole Insulators
- Service Temperature up to 1950°C(3540°F) with OMEGATITE™ 450
TRA-56414-6 Model OptionsView all models
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The diameter and "out of roundness" of OMEGA's insulators is plus or minus 5% or ±0.015", whichever is greater. The straightness is at least 1/32 inch for each six-inch length. The following table lists the maximum recommended wire diameters which should be used with six-inch sections. Closer tolerances are permissible with shorter sections, but the minimum clearance tolerance is ±5% or 0.015 inch, whichever is greater.
This is an impervious, recrystallized, pure alumina ceramic containing over 99.8% Al2O3. It has the most superior gas and vacuum tightness and electrical insulating properties at elevated temperatures. It is non-reactive and recommended for use with platinum, as well as tungsten and molybdenum thermocouple alloys. The maximum service temperature is 1900°C (3450°F).
This is an impervious, recrystallized pure alumina ceramic containing over 99% Al2O3. It has superior gas and vacuum tightness and electrical insulating properties at elevated temperatures. It is non-reactive and compatible with tungsten and molybdenum thermocouple alloys. The maximum service temperature is 1900°C (3450°F).
This material is recommended for most thermocouple applications. It consists of a mullite type ceramic capable of withstanding temperatures up to 1650°C (3000°F).
|Typical Physical Properties|
|Properties||OMEGATITE™ 450||OMEGATITE™ 350||OMEGATITE™ 200|
|Constitution||99.8% Al2O3||99% Al2O3||80% Mullite |
|Gas Permeability||Gas Tight||Gas Tight||Gas Tight|
|Compressive Strength (psi)||300,000||300,000||100,000|
|Tensile Strength (psi)||30,000||30,000||14,000|
|Transverse Strength (psi)||55,000||55,000||20,000|
|Approximate Thermal Conductivity (BTU in)/(hr ft2 °F) |
|Maximum Service Temperature||1950°C |
|Dielectric Constant (1MC)||9.29||8.61||5|
|Dielectric Strength (volts/mil)||230||250||250|
|Volume Resistivity (ohm cm)||1013||1013||-------|
|Hardness (Mohs Scale)||9||9||7|
|Fabrication Method||Cast or Extrusion||Cast or Extrusion||Extrusion|
SINGLE HOLE ROUND INSULATORS
TWO HOLE ROUND INSULATORS
FOUR HOLE ROUND INSULATORS