Protection Sheath Material Datasheets

Materials specification for temperature sensor protection sheaths

Our temperature sensors are specifically designed for many different types of harsh and reducing atmosheres and therefore we supply protection sheaths suitable for each application. Here is a list of datasheets for the materials that we supply and use. This list is available as a PDF. Click on the material names for more information.

Mild Steel	4C54, Ferritic, 446 SS	Platinum Grain Stabilised
321 SS	Sanicro 31 HT®	Hastelloy C276
310 SS	Alloy 600 (Inconel®)	Kanthal AF, Kanthal APM
316 SS	Alloy 800 HT (Incoloy®)	Recrystalised Alumina (Alsint)
353 MA®	Platinum 10% Rhodium	Aluminous Porcelain (Pythagoras)
253 MA®	Kanthal Super	Silicon Carbide (Clay Bonded)
Pyrosil	Sillimanite 60	Silicon Carbide (Recrystalised)
Platinum	Quartz	Monel 400
Cast Iron	Brass	Hastelloy B2
Syalon 101	Platinum 10% Rhodium Grain Stabilised

Platinum
Direct contact with molten glass.

Basic Composition	Pt
Temperature Limits	Depends on expected lifetime
International Standards
Density	21.45 g/cm³
Melting Range	1769 ° C
Specific Heat
Coefficient of Expansion	9.1 x10-6 / ° C
Thermal Conductivity	74 W/m ° C at 20 ° C
Peak Sensors Colour Code

Platinum 10% Rhodium
Direct contact with molten glass, higher strength at elevated temperature .

Basic Composition	Pt 90%, Rh 10%
Temperature Limits	1700 ° C
International Standards
Density	20.00 g/cm³
Melting Range	1840 to 1870
Specific Heat
Coefficient of Expansion	8.6 x10-6 / ° C
Thermal Conductivity	31 W/m ° C at 20 ° C
Peak Sensors Colour Code

Platinum Grain Stabilised
Direct contact with molten glass. As platinum but with higher stress rupture strength and creep behaviour. Grain stabilisation reduces degradation at temperature and allows for a thinner wall. Avoids rhodium inclusion which can discolour glass.

Basic Composition	Pt
Temperature Limits	1700 ° C
International Standards
Density	21.45 g/cm³
Melting Range	1769 ° C
Specific Heat
Coefficient of Expansion	9.1 x10-6 / ° C
Thermal Conductivity	74 W/m ° C at 20 ° C
Peak Sensors Colour Code

Platinum 10% Rhodium Grain Stabilised
Direct contact with molten glass. As platinum 10% rhodium but with higher stress rupture strength and creep behaviour. Grain stabilisation reduces degradation at temperature and allows for a thinner wall.

Basic Composition	Pt 90%, Rh 10%
Temperature Limits	1700 ° C
International Standards
Density	19.80 g/cm³
Melting Range	1840 to 1870
Specific Heat
Coefficient of Expansion	8.6 x10-6 / ° C
Thermal Conductivity	31 W/m ° C at 20 ° C
Peak Sensors Colour Code

Brass
Inexpensive engineering material. Easily machined to complex shapes. Readily available. Becomes brittle with heat.

Basic Composition	Cu 85%, Zn 15%.
Temperature Limits
International Standards
Density	8.8 g/cm³
Melting Range
Specific Heat
Coefficient of Expansion
Thermal Conductivity	High
Peak Sensors Colour Code

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