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Extreme Temperature Exotic Thermocouple Probes

Very High Temperature Exotic Thermocouple Probes

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Very High Temperature Exotic Thermocouple Probes

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Data Sheet (PDF)

C$743.60

Item# XMO-W5R26-U-125-30-A-MQ-12

Volume discounts available

Volume Discount Schedule

Quantity	Price each
1-9	C$743.60
10-24	C$706.42
25-99	C$669.24
100-499	C$632.06
500-999	C$594.88
1000+	C$557.70

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Lead Time (If not in stock): 5 weeks

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Sheaths
• Tantalum
• Molybdenum
• Platinum/Rhodium
• Inconel 600
Thermocouple Elements
• Tungsten/Rhenium
• Platinum/Rhodium
Insulations
• Hafnium Oxide (HfO₂)
• Magnesia (M_gO)
• Alumina (Al₂O₃)
Mating Connector Sold Separately!

View Specs

XMO-W5R26-U-125-30-A-MQ-12 Model Options

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Edit these specs to order a different model. Not all combinations are valid. Options compatible with previous selections will be in bold.

*Highlighted options are not compatible. Please select a different combination.

Thermocouple Type

Process Temperature Range

Sheath Material

Probe Diameter

Probe Length

Wire Gauge

Connector Style

Additional Feature

Sensor Type

Sensor Application

Junction Type

Connector Color Code Standard

Specs

Edit Model Options

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 (M_gO)	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.

All Models

In Stock Only

Reviews

Rated 1 out of 5 by MEJ1 from Find a different supplier My issue with these probes is two-fold: first with the product itself and second with trying to address the product issues. The probes are not consistent from one to the next and I have contacted the engineering team to ensure that they are manufactured with tight tolerances, which they claim they do, but the following has been some of our experience. When changing thermocouples, we see high levels of temperature variation from one to the next which Omega’s provided calibration data does not account for, we have also seen vast differences in the temperature readings within a dual-probe thermocouple itself (i.e., one side reads 1000º while the other is reading 950º), we have been provided with dual thermocouples that have had the wires crossed, and so on. We are currently trying to get Omega to replace a few probes that were faulty and that has been a whole saga. First, they tried to claim that they were out of warranty, then when we were finally able to send them in and checked back a month later to find out the status, we were informed that Omega did not ever receive the probes. Upon sending them the signed delivery confirmation (then calling customer service a week later after not hearing anything) they informed us that they found the probes and could now start evaluating them. It has now been several months with zero updates even though we reach out for status updates every few weeks (which we imagine must be as annoying for them as it is for us). Do what you will with this information, but we found a new supplier.

Date published: 2021-03-17

Manuals & Downloads

Data Sheet (1)

XTA-W5R26_spec

Articles (5)

Questions & Answers

Can this be put directly into an oven?

Asked by: bobbo

The metal probe portion sheath can be inserted into the oven but the connector is rated to only 650C so should not be exposed above it.

Answered by: ApplicationsEngineerANB

Date published: 2024-10-25

Hi, Is Platinum-Rhodium Alloy TC (coded as XPA, https://assets.omega.com/spec/XTA-W5R26.pdf) compatible with fluorine? if yes, then what is the maximum temperature that it can work at in fluorine gas medium? If not, what TCs are compatible? Thanks

Asked by: JimmyC

Hi Jimmy, Thank you for the inquiry. We offer a variety of sheath materials. We can provide test data on the sheath alloys used. End user will need to verify if their specific gas concentration, temperature , and presures will be compatible with the alloys used. Best regards OMEGA

Answered by: NorwalkAE_RS

Date published: 2024-07-25

What kind of reader / data logger can be used to record and view the temperature readings of these ultra high temperature probes?

Asked by: Jamie B

Hi Jamie, Thank you for the inquiry. Some options; https://www.omega.com/en-us/data-acquisition/data-loggers/temperature-and-humidity-data-loggers/hh806/p/HH806AU https://www.omega.com/en-us/data-acquisition/data-loggers/multichannel-programmable-and-universal-input-data-loggers/om-cp-octpro-logger/p/OM-CP-OCTPRO And more options available. For more detail please forward request to TEMP@DWYEROMEGA.COM. Best regards OMEGA

Answered by: NorwalkAE_RS

Date published: 2023-10-29