Miniature Thermocouple with Pot Seal

Mineral insulated thermocouple sensors have a high integrity construction, suited to arduous operating conditions at temperatures from -200ºC to +1250ºC. The maximum operating temperature is dependant on diameter and environmental factors, further guidance is available here
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 PVC, PFA or fibreglass insulated 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 1.0mm and lengths from a few millimetres to 200 metres or more dependent on the sheath diameter selected

Frequently Asked Questions

What is a thermocouple and how does it work?
A thermocouple is a type of temperature sensor that generates a voltage when two different metals are joined at one end and exposed to a temperature difference between the "hot" junction (where the temperature is measured) and the "cold" junction (the reference point). This voltage is then measured to determine the temperature at the hot junction.
How do I choose the right thermocouple for my application?
The ideal thermocouple depends on factors such as temperature range, accuracy, termination type, mounting requirements and environmental conditions. We offer a variety of thermocouples with different sheath materials, constructions, terminations, and temperature ratings to meet your needs. If you need specific advice, our engineers are happy to assist!
What is the maximum temperature rating of your thermocouples?
Our thermocouples are designed to handle a wide range of temperatures with some mineral insulated thermocouples able to withstand temperatures up to 1400ºC and ceramic sheathed thermocouples going even higher to 1600ºC. Each product listing includes the maximum temperature rating, so you can choose the best thermocouple for your application.

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

Illustration	Select
Crimp on St./St. Pot Seal (small)
Crimp on St./St. Pot Seal
Crimp on St./St. Pot Seal
Brass Compression Gland Seal 16mm ISO x 1.5mm - FIXED (sheath diameter 1mm only)
St./St. Compression Gland Seal 16mm ISO x 1.5mm - FIXED (sheath diameter 1mm only
End Seal Temperature Rating: 135°C (standard) 235°C 300°C

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 mtrs

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: 220°C (standard) 350°C 650°C

1	Thermocouple Type	Temperature Range (continuous)	Temperature Range (short term)
K	Nickel 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 Platinum	0°C to +1600°C	-50°C to +1700°C
S	Platinum - 10% Rhodium vs Platinum	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