Alumina Tubes

CeramTec – Advanced Ceramic Tubes & Insulators

Precision Ceramics has introduced a new and exciting range of advanced ceramic tubes and insulators ideally suitable for thermocouple protection in high temperature measurement applications.

The alumina-based tubes are used throughout many industries to aid monitoring the stability and performance of production processes especially those within hostile and aggressive chemical environments at temperatures up to 1,700°C. They are manufactured to DIN V ENV 12212 and are very strong, organically inert and well proven in a wide field of applications.

A comprehensive range of closed one end tubes and open both end tubes in various diameters and stock sizes is available for immediate despatch. All can be cut to length as required and both single and multi-bore tubes are available.

Protection Tubes

Alumina tubes are used as outer protection sheaths. For closed-one-end tubes they are specially produced as a one-piece unit rather than fusing an end piece on making them much stronger and more reliable in operation. The end seal guarantees complete resistance to penetration from the outer atmosphere and coupled with excellent thermal shock resistance, the tubes provide a safe, secure and completely accurate environment for temperature measurement and process monitoring.

Aluminium Oxide (Alumina)

Aluminium oxide (Al2O3), more commonly known as alumina, is a hard wearing material and used throughout many industries. Once fired and sintered, it can only be machined using diamond-grinding methods. Alumina is the most commonly used type of ceramic and is available in purities up to 99.9%. Its combination of hardness, high temperature operation (up to 1,700°C) and good electrical insulation makes it useful for a wide range of applications.

Almost pure alumina (99.7%) provides the highest temperature operation for protection tubes.

Mullite (Aluminium Silicate)

Mullite/Aluminium Silicate is a composition of aluminium oxide (Al2O3) and silicon oxide (SiO2).Suitable for operating temperatures up to 1,500°C, it has high temperature stability and chemical resistance and good mechanical strength. Coupled with low thermal expansion and high thermal shock resistance, it provides a more economical base material for temperature measurement applications in the form of multi-bore insulators and protection tubes.

Comprehensive Range

Initially Precision Ceramics offered a range of 15 Rubalit C 799 Closed One End Tubes with internal diameters ranging from 4mm to 18mm (external diameters ranging from 6mm to 24mm) and in lengths from 530mm to 1,525mm. These have now been complemented with a additional range of 34 Open Both End Tubes with internal diameters ranging from 0.2mm to 25mm (external diameters from 0.7mm to 31mm) and in lengths from 174mm to 1,060mm. Both ranges are held in stock and are available for immediate shipment.