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XT-K-20-25 Nextel or Silica Insulated Thermocouple Duplex Wire
High Temperature Thermocouple Wire with Nextel or Silica Yarn Fiber Insulation
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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.
• 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)
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