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    Extreme Temperature Exotic Thermocouple Probes

    Thermocouple probe assemblies made with exotic sheath materials for extreme temperature applications up to 2315°C. Available in type R, S, B, C, and D calibrations.
    $739.48
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    Data Sheet (PDF)

    Extreme Temperature Exotic Thermocouple Probes
    OMEGA™ Exotic Thermocouple Probes are designed for use in extreme temperatures, up to 2315°C (4200°F). These probes utilize either Platinum/Rhodium (types R, S, or B) or Tungsten/Rhenium (types G, C, or D) elements, with a variety of insulations and sheath materials. Depending upon the sheath material selected, these probes may be used in inert, oxidizing, reducing or vacuum conditions. The maximum temperature is based on the lowest max. temperature of the element, insulation and sheath material. Five cold end probe terminations are available: replacement probe, subminiature or standard size ceramic connector, heavy-duty standard size, molybdenum-sheathed nylon connector, or transition joint with 72-inch lead wire.

    Sheath Materials
    Code Material Max.
    Operating
    Temp.    		 Working
    Environment    		 Approx.
    Melting
    Point    		 Remarks
    XTA Tantalum 2300°C
    4200°F    		 Vacuum 3000°C
    5425°F    		 Resists Many Acids
    and Weak Alkalies.
    Very Sensitive to
    Oxidation Above 570°F
    XMO* Molybdenum 2200°C
    4000°F    		 Inert
    Vacuum
    Reducing    		 2610°C
    4730°F    		 Sensitive to Oxidation
    Above 400°F
    Non-bendable
    XPA Platinum-
    Rhodium
    Alloy    		 1650°C
    3000°F    		 Oxidizing
    Inert    		 1870°C
    3400°F    		 No Attack by SO2
    at 2000°F. Silica Is
    Detrimental. Halogens
    Attack at High Temp.
    XIN Inconel
    600    		 1150°C
    2100°F    		 Oxidizing
    Inert
    Vacuum    		 1400°C
    2550°F    		 Excellent Resistance
    to Oxidation at High
    Temp. Hydrogen Tends
    to Embrittle. Very
    Sensitive to Sulfur
    Corrosion
    *Refractory metals are extremely sensitive to any trace of oxygen above approximately 260°C
    (500°F). Must be used in vacuum or in very pure inert gases such as Hellium or Argon.

    Insulation Materials
    Code Material Max.
    Operating
    Temp.**    		 Approx.
    Melting
    Point    		 Remarks
    H Hafnia
    (HfO2)    		 2500°C
    4530°F    		 2830°C
    5125°F    		 Nontoxic substitute for BeO.
    High Thermal Conductivity.
    M Magnesia
    (MgO)    		 1650°C
    3000°F    		 2790°C
    5050°F    		 Hygroscopic.
    Compacts Well.
    A Alumina
    (Al2O3)    		 1540°C
    2800°F    		 2010°C
    3650°F    		 Requires Considerable
    Volume Reduction to
    Compact Satisfactorily.
    Note:
    For temperatures above 1000°C (1800°F), all insulating materials experience a
    substantial decrease in resistivity with increasing temperatures.

    ** Values given are for compacted insulation. For uncompacted hard-fired insulators,
    useful temperature range can be 5 to 110°C (100 to 200°F) higher.
    Molybdenum sheathed probes are not recommended in applications where they will be
    exposed to carbon, including graphite.

    For Graphite environments, Consult Omega's Custom Engineering Department for Pricing and Delivery on Tungsten Coated Molybdenum sheathed T hermocouples.

    Termination Style Q
    Type OGP heavy-duty, color-coded male and female connectors. Add $10 to base price.
    Termination Style TJ
    Heavy-duty transition termination with 72-inch leads. Add $13 to base price.
    Termination Style HX
    Type NHX high temperature ceramic male and female connectors with color identification dot. Add $17 to base price.
    Termination Style SX
    Type SHX miniature high temperature ceramic male and female connectors with color identification dot. Add $11 to base price.
    Termination Style RP
    Replacement probe style with 1" bare wire leads. No additional price.

    Calibration1 Atmosphere2
    Max.Temp3    		 Model Number
    C
    W-5% Re
    vs. W-26% Re    		 V.
    2300°C
    4200°F    		 XTA-W5R26-U-062-30-H-*-**
    XTA-W5R26-U-125-30-H-*-**
    XTA-W5R26-U-125-24-H-*-**
    R*
    Pt-13% Rh
    vs. Pt    		 V.
    1475°C
    2700°F    		 XTA-P13R-U-062-30-M-*-**
    XTA-P13R-U-125-24-M-*-**
    XTA-P13R-U-062-30-H-*-**
    XTA-P13R-U-125-24-H-*-**
    C
    W-5% Re
    vs. W-26% Re    		 I.V.R.
    2200°C
    4000°F    		 XMO-W5R26-U-125-30-H-*-**
    XMO-W5R26-U-250-30-H-*-**
    C
    W-5% Re
    vs.W-26% Re    		 I.V.R.
    1540°C
    2800°F    		 XMO-W5R26-U-250-30-A-*-**
    XMO-W5R26-U-062-40-A-*-**
    XMO-W5R26-U-125-30-A-*-**
    R*
    Pt-13% Rh
    vs. Pt    		 I.V.R.
    1480°C
    2700°F    		 XMO-P13R-U-125-30-A-*-**
    XMO-P13R-U-250-24-A-*-**
    C
    W-5% Re
    vs. W-26% Re    		 O.I.V.
    1540°C
    2800°F    		 XPA-W5R26-U-125-30-A-*-**
    R*
    Pt-13% Rh
    vs. Pt    		 O.I.V.
    1480°C
    2700°F    		 XPA-P13R-U-062-30-M-*-**
    XPA-P13R-U-125-24-M-*-**
    XPA-P13R-U-125-30-A-*-**
    C
    W-5% Re
    vs. W-26% Re    		 O.I.V.
    1150°C
    2100°F    		 XIN-W5R26-U-062-30-M-*-**
    XIN-W5R26-U-125-30-M-*-**
    R*
    Pt-13% Rh
    vs. Pt    		 O.I.V.
    870°C
    1600°F    		 XIN-P13R-U-062-30-M-*-**
    XIN-P13R-U-125-30-M-*-**
    XIN-P13R-U-125-24-M-*-**
    XIN-P13R-U-187-24-M-*-**
    XIN-P13R-U-250-24-M-*-**
    XIN-P13R-U-250-20-M-*-**
    * Specify Termination Style: Q, TJ, HX, SX, or RP
    ** Specify Probe Length in inches

    		   
    Note 1:   Prices subject to change
    Please consult the Sales
    Department for current pricing.
    Note 2:   Atmospheres:
      O-Oxidizing
       I-Inert
       V-Vacuum
       R-Reducing.
    Note 3:   Maximum service temperatures shown are for probes with the largest available gage wire leads. Consult Engineering for ratings of other dimension probes.
    Note 4:   Bending: XPA sheathed probes with platinum elements be bent in the field.
    Note 5:   Some probes available in dual configurations. Check with Sales Department.