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You are here → Home > Temperature Sensors > Thermocouples > Mineral Insulated Thermocouples > Thermocouple with Pot Seal and cable

Thermocouple with Pot Seal and Cable

Mineral Insulated Thermocouples

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Thermocouple Connectors
  • Mineral insulated thermocouple sensors have a high integrity construction, suited to arduous operating conditions at temperatures from -200ºC to +1400ºC. (The maximum operating temperature is dependent 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 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 10.8mm and lengths from a few millimetres to 200 metres or more dependent on the sheath diameter selected

Thermocouple Quote Request

Use this form to configure a single sensor style. If you require multiple sensor styles, please list them in the Additional Information box at the end of the form or contact us for assistance.

1. Sensor Basics

Not sure which thermocouple type you need? View thermocouple types and temperature ranges

Need help choosing a tolerance class? See tolerance classes explained

Unsure which sheath material you need? View our thermocouple sheath material guidance page

mm
2. Sensing Junction
Insulated Junction
Insulated Junction
Hot junction insulated from sheath. Gives floating output with typical insulation resistance in excess of 100 megohms.
Recommended
Grounded Junction
Grounded Junction
Hot junction welded to sheath tip giving earthed output and faster response to temperature changes
Exposed Junction
Exposed Junction
Fastest response mainly for the measurement of air temperature in ducts. Restricted to a maximum operating temperature of 600ºC
Number of elements:
3. Pot Seal Style
3P2L
3P2L
for sheath diameters up to 3mm
3P2TRL
3P2TRL
with anti chafe spring - for sheath diameters up to 3mm
3P4CL
3P4CL
for sheath diameters from 3mm to 8mm
3P4CTRL
3P4CTRL
with anti chafe spring - for sheath diameters from 3mm to 8mm
3P3L
3P3L
8mm ISO x 1mm threaded pot - for sheath diameters up to 3mm
3P5
3P5
Brass Compression Gland Seal, 16mm ISO x 1.5mm - FIXED for sheath diameters 1mm to 8mm
3P5S
3P5S
St./St. Compression Gland Seal, 16mm ISO x 1.5mm - FIXED for sheath diameters 1mm to 8mm
End Seal Temperature Rating
4. Extension Cable

Sensors with a pot seal are supplied with PFA tails as standard, as shown above. However, for many applications, a length of cable is more practical. If you require longer leads, please select a cable from the list below:

5. Optional Connector
6. Optional Swaged Reduced Tip

A reduced tip is a short section at the end of the sensor sheath that is reduced to a smaller diameter. This can improve response time where faster temperature measurement is required. Select this option if you would like the probe tip reduced.

7. Optional Compression Fitting
St.St. fitting
Stainless Steel
Brass fitting
Brass Fitting
8. Contact Details

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.