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Nextel or Silica Insulated Thermocouple Duplex Wire

High Temperature Thermocouple Wire with Nextel or Silica Yarn Fiber Insulation


Item# XT-K-20-IB-100

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-4 $613.93
5-9 $583.23
10-24 $552.54
25-49 $521.84
50-99 $491.14
100+ $460.45

In stock

Lead Time ( If not in Stock): 4 weeks

High Temperature Thermocouple Wire with Nextel or Silica Yarn Fiber Insulation XT-K-20-IB-100 XT-K-20-IB-100
  • Ceramic Insulation Material is Overbraided on Std or SLE grade Wire
  • XC :Nextel 312 standard, rated to 1200°C (2200°F) Continuous, 1425°C (2600°F) Short Term
  • XS: Silica Yarn, rated to 1050°C (1900°F) Continuous
  • XR: Refrasil Vitreous Silica Fiber, suitable to 982°C (1800°F)
  • XC4:Nextel 440, rated to 1375°C (2500°F) Continuous, and 1550°C (2800°F) Short Term
  • Thermocouple Color Tracers on Jacket and Conductors
  • Inconel 600 or 304SS Overbraid will add Durability

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Temperature Unit
Temperature Min
Temperature Max
Temperature range
Thermocouple Calibration Type
Wire Gauge
Conductor Insulation
Conductor type
Cable Length
Additional Feature
Cable Type
Overall Insulation
Number of Pairs
Overbraiding Type
Special Limit of error
Color Code Standard

Product Specs

  • Use With Sensor Type Thermocouple

Nextel insulation a high temperature ceramic is offered with in three types of overbraiding. XC is the standard braid, XT is a tight braid and XL is a loose braid. The three braids affect only the amount of Nextel used, not the overall temperature rating. Insulation is braided over each wire or leg then a final jacket of the same insulation is braided over the pair of wires.

XC4: Nextel 440 insulation has the highest temperature rating to 1375C (2500F)

Silica insulation is a high purity (SiO2 > 99%) ceramic yarn, that offers high temperature protection up to 2000°F at an economical price. Refrasil insulation is a vitreous silica fiber.

Inconel 600 ,304SS or Tinned Copper can be added and overbraided as the outer jacket over the Nextel insulation . This type of durable outer jacket can add abrasion protection and signal shielding.

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Is it durable enough to use it(XC-4) at least 50 times with inconel overbraid? One time usage is considered as increasing temp up to 750 and 04 hours of soaking time at 750 °C and again lowering temp to room temp.

Asked by: Anonymous1
Thank you for the inquiry. The XC-4 can handle this with the inconel over braid. The XC and XS can also take this temperature with inconel over braid. Best regards OMEGA
Answered by: NorwalkAE_RS
Date published: 2021-05-04
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