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Extreme Temperature Exotic Thermocouple Probes
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XTA-W5R26

Extreme Temperature Exotic Thermocouple Probes

1.0
(1)
Models In Stock
  • Sheaths
    • Tantalum
    • Molybdenum
    • Platinum/Rhodium
    • Inconel 600
  • Thermocouple Elements
    • Tungsten/Rhenium
    • Platinum/Rhodium
  • Insulations
    • Hafnium Oxide (HfO2)
    • Magnesia (MgO)
    • Alumina (Al2O3)
  • Mating Connector Sold Separately!
XTA-W5R26
From C$ 407.15
Models In Stock
Shop Models
More Variations Available
See all series options below
XTA-W5R26Data Sheet

Data Sheet
Extreme Temperature Exotic Thermocouple Probes XTA-W5R26 XTA-W5R26
Product Overview
  • Alloy Material (-) Platinum - 6% Rhodium
  • Alloy Material (+) Platinum - 30% Rhodium
  • Color Code Standard ANSI
  • Junction Type Ungrounded
  • Operating Temperature, Min 0 °C
  • Process Connection Size N/A
  • Process Temperature, Min 0 °C
  • Temperature Sensor Type Thermocouple
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.
1.0
(1)
Rated 1 out of 5 by 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
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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: ApplicationEngineerANB
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
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