Brearley Mineral Insulated Thermocouples
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Brearley Mineral Insulated Thermocouples are metal sheathed cables with thermocouple conductors which are insulated from each other and the sheath by highly compacted magnesium oxide.
Conductors are safe from environmental contamination, ductile and highly responsive.
The cables are water, oil and gas resistant, extremely robust and are eminently suitable for applications where high or low temperature, corrosion, vibration, pressure and other extreme conditions exist.
Brealey Mineral Insulated Thermocouples can be designed and tested to comply with the requirements of AMS 2750D and NADCAP.
Conductors are safe from environmental contamination, ductile and highly responsive.
The cables are water, oil and gas resistant, extremely robust and are eminently suitable for applications where high or low temperature, corrosion, vibration, pressure and other extreme conditions exist.
Brealey Mineral Insulated Thermocouples can be designed and tested to comply with the requirements of AMS 2750D and NADCAP.
Full Product Specification
Standard Metal Sheath Materials| TYPE S 18/8/1 Stainless Steel / Chrome / Nickel / Titanium Grade 321 Excellent resistance to corrosion. Retaining good ductility in a wide range of industrial applications. Max temperature 800°C |
TYPE I 76/16/7 Inconel / Nickel / Chrome / Iron type 600 Excellent corrosive and oxidation resistant at elevated temperatures. Should not be used in Sulphur bearing atmospheres above 550°C Max temperature 1100°C |
| TYPE W 25/20 Stainless Steel/Chrome/Nickel Grade 310 Good high temperature corrosion resistance. Suitable for use in sulphur bearing atmospheres but should not be subjected to subsequent manipulations. Max temperature 1100°C |
TYPE N 84/14/1 Nicrosil / Nickel / Chrome/ Silicon Used with type N conductors for 1200°C plus. High oxidation resistance reduces calibration drift at temperature when used in non-carburising atmospheres. Max temperature 1250°C |
Standard Thermocouple Alloy Conductor Types
| Code | Conductor Combination | Recommemded Operating Temperature Range for Conductor Combinations |
|
| Continuous °C | Short Term °C | ||
| K | Nickel Chromium vs Nickel Aluminium | 0 to +1100 | -180 to +1350 |
| T | Copper vs Constantan | -185 to +300 | -250 to +400 |
| J | Iron vs Constantan | +20 to +700 | -180 to +750 |
| N | Nickel-Chromium-Silicon vs Nickel-Silicon-Magnesium | 0 to +1100 | 0 to +1300 |
| E | Nickel Chromium vs Constantan | 0 to +800 | - |
Sheath Diameters
With reference to Standard Sheath Materials
| T/C Type | Cable Diameters (mm) | ||||
| 0.5 | 1.0 | 1.5 | 2.0 | 3.0 | |
| T | - | S | S | - | S |
| N | - | I,N | I,N | I | I,N |
| J | - | S | I,S | I,S | I,S |
| K | I,S | I,S,W | I,S,W,N | I,S,W | I,S,W,N |
| 4.5 | 5.5 | 6.0 | 10.8 | ||
| T | S | - | S | - | |
| N | I | - | I,N | - | |
| J | I,S | - | I,S | I | |
| K | I,S,W | I,W | I,S,W,N | I,W | |
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