Very High Temperature Exotic Thermocouple Probes |
| XTA, XMO, XPA, XIN Series |
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Sheaths
• Tantalum
• Molybdenum
• Platinum/Rhodium
• Inconel 600
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Thermocouple Elements
• Tungsten/Rhenium
• Platinum/Rhodium
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Insulations
• Hafnium Oxide (HfO2)
• Magnesia (MgO)
• Alumina (Al2O3)
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Mating Connector Sold Separately!
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View related products - Thermocouples
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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
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Note 1:
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Prices subject to change
Please consult the Sales
Department for current pricing.
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Note 2:
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Atmospheres:
O-Oxidizing
I-Inert
V-Vacuum
R-Reducing.
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Note 3:
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Maximum service temperatures
shown are for probes with the
largest available gage wire leads.
Consult Engineering for ratings of
other dimension probes.
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Note 4:
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Bending: XPA sheathed
probes with platinum elements
be bent in the field.
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Note 5:
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Some probes available in dual
configurations. Check with Sales
Department.
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† Price are shown in RMB.
Note:
Note 1: Prices subject to change. Please consult the Sales Department for accurate 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 can be bent in the field.
Note 5: Some probes available in dual configurations. Check with Sales Department.
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