XTA-W5R26-TJ

Supported Applications

The Omega™ XTA exotic thermocouple probes with lead wire are designed for extreme-temperature measurement up to 2315 °C (4200 °F). They use either Platinum/Rhodium elements (Type R, S, or B) or Tungsten/Rhenium elements (Type C or D) with a range of insulation and sheath materials, and terminate in a transition joint (TJ) or RP-style lead for direct wiring into instrumentation. Depending on the sheath selected, probes serve inert, oxidizing, reducing, or vacuum conditions.

Because refractory metals are extremely sensitive to any trace of oxygen above approximately 260 °C (500 °F), the tungsten/rhenium sheath options must be used in vacuum or in very pure inert gases such as helium or argon.

Operating Conditions & Performance

The probes measure temperatures up to 2315 °C (4200 °F), with the maximum temperature of the final assembly set by the lowest-rated of the element, insulation, and sheath materials. All probes are ungrounded.

• Element / calibration: Platinum/Rhodium (Type R, S, B) or Tungsten/Rhenium (Type C, D), via calibration codes such as W5R26, W3R25, P10R, P13R, and P30R.
• Sheath materials: Tantalum, Molybdenum, Platinum-Rhodium alloy, or Inconel 600.
• Sheath diameters: 0.062 in (1/16 in), 0.125 in (1/8 in), 0.187 in (3/16 in), and 0.250 in (1/4 in).
• Media: vacuum, inert, oxidizing, or reducing atmospheres, per the selected sheath.

Dual-element assemblies provide two sensor readings for built-in backup or for sending signals to different instruments.

Configuration Options

Part numbers follow an ordering-guide breakdown of sheath-material code, calibration code, junction, sheath diameter, wire gauge, insulation code, termination style, length, and single/dual element. This lead-wire family uses the transition-joint and lead terminations:

• Junction: ungrounded (U).
• Termination styles: TJ (transition joint), RP, and related lead terminations (TJ-BX, TJ-SB).
• Length: 1" to 48" in 0.5" increments (to 100" for selected constructions).
• Element count: single or dual element.

Tungsten/rhenium probes can be tungsten-coated when required for additional protection.

Key Product Differences

The lead-wire series covers the platinum/rhodium and tungsten/rhenium calibrations across the sheath, diameter, and length options with transition-joint and RP terminations. Representative catalog numbers include:

• XTA-W5R26-U-125-30-H-TJ-6
• XTA-W5R26-U-125-30-H-TJ-18
• XTA-W5R26-U-125-30-H-TJ-24

Specify sheath-material code, calibration, junction, sheath diameter, wire gauge, insulation, termination style, length, and single/dual element to define a complete probe.