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Mineral Insulated Bayonet Thermocouple (Type 11A)

General Purpose Thermocouples

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Suitable for plastics machinery and general purpose applications these assemblies are available in thermocouple types K, T, J, N and E with an industry standard one slot adjustable bayonet cap fitting. The fitting can be fine tuned for positioning on site and is suitable where several applications in your plant require individual positioning of the assembly. The sensor is mineral insulated with a diameter of 4.5mm as standard but a 3.0mm option is available and rated to 800°C and can therefore be bent after installation for exact positioning. A choice of leads is available including stainless steel braided cable or flexible stainless steel conduit. As with any mineral insulated thermocouple the junction can be grounded or insulated.

Bayonet Thermocouple Enquiry Form

1. Thermocouple Type
2. Sheath Diameter

3. Sheath Length 'L1'

 mm
4. Cable Style

5. Cable Length 'L2'

 mtrs*
6. Type of Sensing Junction

Illustration Select
INSULATED Junction
GROUNDED Junction
Duplex Element Required? (please tick box)
Triplex Element Required? (please tick box)
7. Optional Thermocouple Plug
8. Quantity Required

Contact Details

Company Name


Your Name


Email


Telephone


Additional Information

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



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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.

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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
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

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

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