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Very High Temperature Exotic Thermocouple Probes
XTA, XMO, XPA, XIN Series
PLACE ORDER - Sheaths
• Tantalum
• Molybdenum
• Platinum/Rhodium
• Inconel 600 - Thermocouple Elements
• Tungsten/Rhenium
• Platinum/Rhodium - Insulations
• Hafnium Oxide (HfO2)
• Magnesia (MgO)
• Alumina (Al2O3)
Description
Description
trodeks® Exotic ThermocoupleProbes are designed for use inextreme temperatures, up to 2315°C(4200°F). These probes utilize eitherPlatinum/Rhodium (types R, S, or B)or Tungsten/Rhenium (types G, C, orD) elements, with a variety ofinsulations and sheath materials.Depending upon the sheath materialselected, these probes may be usedin inert, oxidizing, reducing orvacuum conditions. The maximumtemperature is based on the lowestmax. temperature of the element,insulation and sheath material. Fivecold end probe terminations areavailable: replacement probe,subminiature or standard sizeceramic connector, heavy-dutystandard size, molybdenum-sheathednylon connector, or transition jointwith 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 trodeks's Custom EngineeringDepartment for Pricing and Delivery on Tungsten Coated Molybdenumsheathed 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-187-26-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 and XIN sheathed probes with platinum elements be bent in the field. | | Note 5: | Some probes available in dual configurations. Check with Sales Department. | |
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