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Aluminous Porcelain Tube
12x8mm ceramic tube

12mm OD x 8mm ID – Aluminous Porcelain Tube – Open Both Ends

From: £15.35 - £27.80 Exc VAT

Good thermal shock resistance. Mainly used with base metal thermocouples such as J, K, and N thermocouple types.

  • Equivalent to Pythagoras
  • Basic Composition: Al2O3 60%
  • Temperature Limits: 1400°C
  • International Standards: DIN VDE 0335 C610
  • Density: 2.6 g/cm³
  • Coefficient of Expansion: 6 x10-6 / ° C
  • Thermal Conductivity: 2 W/m ° C
  • Length and Diameter Tolerance: DIN 40680 Medium

Delivery time: 1-2 working days.

Compliance:
✔ REACH (1907/2006) 2025)
✔ RoHS 3 (2015/863)
✔ Mineral Conflict
✔ ISO 9001 Certified

PQAL black on white ukas 9001 logo

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        Delivery time: 1-2 working days.

        We ship to the following countries:
        United Kingdom, Austria, Belgium, Bosnia and Herzegovina, Brazil, Bulgaria, Canada, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, India, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, United States

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        • £25 for orders from UK – Highlands & Islands.
        • £35 for orders from Belgium, Ireland, Luxembourg and Netherlands.
        • £37 for orders from France and Germany.
        • £42 for orders from Switzerland.
        • £43 for orders from Austria, Denmark, Italy, Portugal and Spain.
        • £45 for orders from Czech Republic, Slovakia, Slovenia and Bulgaria.
        • £49 for orders from Iceland.
        • £51 for orders from Finland, Sweden and Greece.
        • £53 for orders from Croatia, Estonia, Hungary, Poland, Latvia, Lithuania and Romania.
        • £61 for orders from United States and Canada.
        • £63 for orders from Liechtenstein.
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        • +44 (0) 1246 261 999
        • websales@peaksensors.com
        Q: What is a 12mm OD x 8mm ID Aluminous Porcelain Tube with open ends used for?
        A: This ceramic tube is designed to provide protection and electrical insulation for thermocouple wires and sensor assemblies in high-temperature environments. The open-both-ends design allows thermocouple conductors to pass through the entire tube, making it suitable for furnace instrumentation, kiln installations, and custom temperature sensor assemblies.
        Q: What is the difference between an open-ended and a closed-end ceramic tube?
        A: An open-ended tube is primarily used to guide and insulate thermocouple wires along their length, while a closed-end tube protects the thermocouple junction from direct process exposure. Open-ended designs are commonly used in custom sensor construction and replacement thermocouple assemblies.
        Q: Which thermocouple types are compatible with this ceramic tube?
        A: This aluminous porcelain tube is mainly used with base metal thermocouples such as Type J, Type K, and Type N. These thermocouples are widely used in industrial temperature measurement applications where high-temperature insulation and protection are required.
        Q: What maximum temperature can this ceramic tube withstand?
        A: The tube has a maximum temperature rating of 1400°C. This makes it suitable for use in furnaces, kilns, heat treatment plants, laboratory equipment, and other industrial high-temperature processes.
        Q: Why is aluminous porcelain commonly used for thermocouple protection?
        A: Aluminous porcelain offers excellent heat resistance, good electrical insulation, and strong thermal shock resistance. These properties make it a popular choice for protecting temperature sensors in demanding thermal environments where reliability and durability are important.
        Q: Is this ceramic tube suitable for applications involving rapid temperature changes?
        A: Yes. The tube provides good thermal shock resistance, allowing it to withstand repeated heating and cooling cycles. This characteristic is important in applications such as heat treatment and furnace operation where thermal conditions can change significantly.
        Q: What advantage does the 12mm outer diameter and 8mm inner diameter provide?
        A: The 12mm outer diameter offers increased mechanical strength compared with smaller tubes, while the 8mm internal diameter provides space for larger thermocouple assemblies, insulated conductors, or multi-element sensor configurations.
        Q: When should I choose a ceramic tube instead of ceramic insulator beads?
        A: An open-ended ceramic tube is often preferred when continuous protection is needed along the full length of a thermocouple assembly. Ceramic beads are typically used to separate individual conductors, whereas a ceramic tube provides both insulation and physical protection over a longer distance.
        Q: Which industries commonly use open-ended aluminous porcelain tubes?
        A: These tubes are widely used in heat treatment, ceramics manufacturing, furnace construction, laboratories, metal processing, power generation, glass production, and industrial process heating applications where thermocouple protection is required at elevated temperatures.
        Q: Does this ceramic tube comply with recognised industrial standards?
        A: Yes. The tube is manufactured to DIN VDE 0335 C610 standards and is supported by REACH, RoHS, Conflict Minerals, and ISO 9001 compliance requirements. This makes it suitable for use in quality-controlled industrial and manufacturing environments.

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