thermocouple & pt100 sensors - Peak Sensors

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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.

 

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