View our ISO 90001/2008 Certficate

Mineral Insulated Thermocouples

with Pot Seal

  • High integrity construction suited to arduous operating conditions at temperatures from -200ºC to +1250ºC
  • Custom built to your specification and terminated in a wide choice of pot seal styles and temperature ratings. Supplied with either short tails as shown or a longer extension lead
  • Alternatively, we have a large range of sensors available to buy online in various diameters and lengths
  • High accuracy and stability maintained throughout the operating life of the sensor
  • Fast response and high insulation resistance
  • Available in thermocouple types K, T, J, N, E, R, S & B with sheath diameters from 0.25mm to 10.8mm and lengths from a few millimetres to 200 metres or more dependent on the sheath diameter selected

Enquiry Form

1. Thermocouple Type

2. Sheath Material

3. Sheath Diameter

4. Sheath Length


5. Types of Sensing Junction

Illustration Select
EXPOSED Junction
Duplex Element Required? (please tick box)
Triplex Element Required? (please tick box)

6. Pot Seal Style

Illustration Select
Crimp on St./St. Pot Seal
(sheath diameters up to 3mm)
Crimp on St./St. Pot Seal
(sheath diameters 3mm to 8mm)
Pot Seal with Anti Chafe Spring
(sheath diameters 3mm to 8mm)
Threaded Pot - 8mm ISO x 1mm
(sheath diameters up to 3mm)
Brass Compression Gland Seal 16mm ISO x 1.5mm - FIXED
(sheath diameters 1mm to 8mm)
St./St. Compression Gland Seal 16mm ISO x 1.5mm - FIXED
(sheath diameters 1mm to 8mm)

End Seal Temperature Rating:

7. Extension Leads

Illustration Select
PVC (rated to 105ºC)
PFA (rated to 250ºC)
Fibreglass (rated to 480ºC)
Fibreglass with St./St. Overbraid (rated to 480ºC)
Colour Codes available to IEC 60751
Please enter Cable length in metres


8. Optional Compression Fitting

9. Optional Connector

Illustration Select
Standard 2 pin (round) Plug
Miniature 2 pin (flat) Plug
Standard 2 pin (round) Socket
Miniature 2 pin (flat) Socket
Colour Codes available to IEC 60751

Connector Temperature Rating:

10. Quantity Required

Contact Details

Company Name

Your Name



Additional Information

If your enquiry is for more than one style of sensor, please email us with your requirements or use the box below

Send Enquiry  

1 Thermocouple Type Temperature Range (continuous) Temperature Range
(short term)
KNickel Chromium vs
Nickel Aluminium
0°C to +1100°C -180°C to +1350°C
T Copper vs Constantan -185°C to +300°C -250°C to +400°C
J Iron vs Constantan +20°C to +700°C -180°C to +750°C
N Nicrosil vs Nisil 0°C to +1100°C -270°C to +1300°C
E Nickel Chromium vs Constantan 0°C to +800°C -40°C to +900°C
R Platinum - 13% Rhodium vs
0°C to +1600°C -50°C to +1700°C
S Platinum - 10% Rhodium vs
0°C to +1550°C -50°C to +1750°C
B Platinum - 30% Rhodium vs
Platinum 6% Rhodium
+100°C to +1600°C +100°C to +1820°C
Temperature ranges refer to the thermocouple type.
The temperature range of the sensor may deviate from the above,
please refer to the product description for more details
2 Sheath Material Max.
Standard Sheath Materials

321 Stainless Steel

310 310 Stainless Steel 1100°C
600 Inconel 600 1100°C
Specialized Sheath Materials
601 Inconel 601 1175°C
800 Incoloy 800 1100°C
825 Incoloy 825 1100°C
114 Nicrobell D 1250°C
446 AISI 446 1150°C
156 Hastelloy X 1220°C
276 Hastelloy 276 1100°C
160 Haynes 160 1200°C
P10R Platinum 10% Rhodium 1400°C
* 5.5mm diameter is a thick wall heavy duty construction

Hot junction insulated from sheath. Gives floating output with typical insulation resistance in excess of 100 megohms

Hot junction welded to sheath tip giving earthed output and faster response to temperature changes

Fastest response mainly for the measurement of air temperature in ducts. Restricted to a maximum operating temperature of 300ºC

Assemblies with pot seals are supplied with short tails as shown. However, where leads are several metres or more long, it is more suitable to have an overall sheathed cable. We recommend the following cables, which are 7/0.2mm, laid flat and overall sheathed constructions. Other cables are available, please contact us for details.