High Temperature Ceramic Sheathed Thermocouples

High Temperature Thermocouple with IP67 heavy duty cast iron head

  • These assemblies are used for temperature measurement to 2920°F/1600°C plus in kilns, furnaces and flues etc
  • These assemblies are available as standard with primary and optional secondary ceramic protective sheaths in a range of diameters of; impervious aluminous porcelain, impervious recrystallised alumina, impervious mullite and silicon carbide
  • Alternatively, we have a large range of sensors available to buy online in various diameters and lengths
  • UKAS calibration is available for our range of Ceramic Sheathed Thermocouple assemblies
  • Assemblies in all the common high temperature thermocouple conductor combinations are available in both simplex or duplex styles
  • Available attachment fittings include adjustable flanges or welded bushes
  • See detailed information on how a thermocouple works

  • High Temperature Thermocouple Enquiry Form

    1. Thermocouple Type
    2. Number of Elements
    3. Primary Sheath Material
    4. Primary Sheath Diameter
    5. Sheath Length below head
    6. Secondary Sheath Material
    7. Optional Tube Mounting

    Illustration Select
    Not Required
    3/4" NPT Welded Fixed Position Screwed Bush
    1" NPT Welded Fixed Position Screwed Bush
    4" Adjustable
    Cast Iron Flange
    8. Optional 4 to 20mA Transmitter
    9. 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

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    Thermocouple Sensors
    Mineral Insulated Thermocouples
    Thermocouples with Mini Plug
    Thermocouples with Terminal Head
    Thermocouples with Wire
    High Temperature Thermocouples
    General Purpose Thermocouples
    IECex/ATEX Thermocouple Sensors
    Ceramic Thermocouple Sensors
    Fast Response Thermocouple Sensors
    Autoclave Thermocouple Sensors
    Surface Measurement Thermocouple Sensors
    FEP Insulated Thermocouple

    Platinum Resistance Thermometers
    Mineral Insulated RTD Pt100 Sensors
    Rigid Stem RTD Pt100 Sensors
    Hand Held RTD Pt100 Sensors
    Surface Measurement RTD Pt100 Sensors
    RTD Pt100 Sensors with Wire
    RTD Pt100 Sensors with Mini Plug
    Autoclave RTD Pt100 Sensors
    RTD Pt100 with Terminal Head
    IECex/ATEX Platinum Resistance Thermometers
    Fast Response RTD Pt100 Sensors
    Air Temperature RTD Pt100 Sensors
    Magnetic RTD Pt100 Sensors
    PVC Single Pair Thermocouple and Extension Wire
    PFA Single Pair Thermocouple and Extension Wire
    Fiberglass Single Pair Thermocouple & Extension Wire
    PVC Multipair Thermocouple Wire
    PFA Multipair Thermocouple Wire
    Fiberglass Multipair Thermocouple Wire
    PVC RTD Pt100 Wire
    PFA RTD Pt100 Wire
    Fiberglass RTD Pt100 Wire

    Miniature Thermocouple Connectors
    Mini Thermocouple Connectors – 410ºF Rated
    Mini Thermocouple Connectors – 660ºF Rated
    Mini Thermocouple Connectors – 1200ºF Rated
    Mini Thermocouple Connector Accessories
    Mini Thermocouple Connector Panels
    Mini Three Pin Connectors

    Standard Thermocouple Connectors
    Standard Thermocouple Connectors – 410ºF
    Standard Thermocouple Connectors – 660ºF Rated
    Standard Thermocouple Connectors – 1200ºF Rated
    Standard Thermocouple Connector Accessories
    Standard Thermocouple Connector Panels
    Standard Three Pin Connectors
    Hand Held Indicators
    Temperature Transmitters
    Temperature Controllers
    Temperature Calibrators
    Chart Recorders
    Multi Channel Indicator
    DIN Rail Mounted Transmitters
    Head Mounted Transmitters
    IECEx/ATEX Rated Transmitters
    Dry Block Calibrator
    Temperature Dataloggers

    Temperature Accessories
    Compression Fittings
    Pressure and Vacuum Feedthroughs
    IECEx/ATEX Compression Fittings

    Calibration Services

    © 2006- TC Measurement and Control Inc., PO Box 685, Hillside, IL 60162, United States
    Tel.: 877 249 1777, Fax: 708 449 0777, Email:

    1 Thermocouple Type Temperature Range (continuous) Temperature Range
    (short term)
    K Nickel Chromium vs
    Nickel Aluminium
    32°F to +2010°F -290°F to +2460°F
    J Iron vs Constantan +68°F to +1290°F -290°F to +1380°F
    N Nicrosil vs Nisil 32°F to +2010°F -450°F to +2370°F
    R Platinum - 13% Rhodium vs
    32°F to +2820°F -60°F to +3180°F
    S Platinum - 10% Rhodium vs
    32°F to +2910°F -60°F to +3090°F
    B Platinum - 30% Rhodium vs
    Platinum 6% Rhodium
    +212°F to +2910°F +212°F to +3310°F
    C Tungsten - 5% Rhenium vs
    Tungsten 26% Rhenium
    +120°F to +3330°F +68°F to +4170°F
    D Tungsten - 3% Rhenium vs
    Tungsten 26% Rhenium
    32°C to +3810°F 32°F to +4710°F
    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
    3/6 Standard Sheath
    IAP Impervious Aluminous Porcelain
    Suitable for base metal thermocouples.
    Low temperature coefficient.
    Suited to kiln applications.
    Requires support at high temperatures if horizontal.
    IM Impervious Mullite
    For use with precious metal thermocouples
    Great mechanical strength.
    Relatively inert to suplhurous and carbonaceous atmospheres.
    Often used as a secondary sheath with silicone carbide primary.
    IRA Impervious Recrystallised Alumina
    For use with precious metal thermocouples.
    Fair thermal shcok resistance. High inertness to chemicals.
    Ideal for reducing carbonaceous atmospheres.
    High resistance to alkaline and other fluxes.
    SC Silicone Carbide
    A Porous material with outstanding resistance to thermal shock.
    Good mechanical strength.
    Often used as a primary sheath material enclosing a secondary.
    Unsuitable for highly oxidising atmospheres.
    Primary Sheath
    Metal Support Tube
    8mm 21.3 x 100mm
    Support Tube
    10mm 21.3 x 100mm
    Support Tube
    12mm 21.3 x 100mm
    Support Tube
    17mm 26.7 x 100mm
    Support Tube
    20mm 26.7 x 100mm
    Support Tube

    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 1110°F