Ihne & Tesch tubular heaters are available in diameters of 6.5 and 8.5 mm, with sheath materials 1.4541, 1.4571 and 1.4828, for operating temperatures up to 950 °C. MgO insulation and a NiCr heating conductor make them suitable for liquid baths, air heaters, hot-runner manifolds and many other applications.
Ihne & Tesch tubular heaters are manufactured in-house and are primarily used in liquid baths, air heaters, hot-runner manifolds, screw-in and flanged heaters, heating banks, heat exchangers, flow heaters and tool heating. They are also used in our own manufacture of cast-in heaters.
| ⌀ 6,5 Connections at both ends |
⌀ 8,5 Connections at both ends |
⌀ 8,5 Connection at one end |
||||||
|---|---|---|---|---|---|---|---|---|
| 1.4541 | 1.4571 | 1.4828 | 1.4541 | 1.4571 | 1.4828 | 1.4541 | 1.4828 | |
| Sheath material jacket material |
1.4541 | 1.4571 | 1.4828 | 1.4541 | 1.4571 | 1.4828 | 1.4541 | 1.4828 |
| Operating temperature¹ operating temperature¹ |
750 °C | 850 °C | 950 °C | 750 °C | 850 °C | 950 °C | 750 °C | 850 °C |
| Operating voltage operating voltage |
to customer specification, max. 500 V | |||||||
| Diameter tolerance diameter tolerance |
± 0,1 mm | |||||||
| Length length |
300 to 6,000 mm | 300 to 2,500 mm | ||||||
| Length tolerance² length tolerance² |
bis 1000 mm: ± 10 mm | ab 1000 mm: ± 1 % | ± 10 mm | ||||||
| Cold ends cold ends |
ab 30 mm | Connection end: min. 40 mm, max. 200 mm Closed end: approx. 8 mm |
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| Heating conductor heat conductor |
NiCr | |||||||
| Insulation material insulation material |
Magnesiumoxid (MgO) | |||||||
| Connection connection |
Pin, dia. 2.3 mm | M4 screw terminal | Kabel GLS 400 | |||||
| Bending radii² bend radius² |
5 and 7.5 mm | 7.5 and 10 mm | ||||||
¹ measured at the tubular-heater sheath | ² other values on request
Tubular heaters are manufactured with different connection designs according to diameter, protection rating, installation space and electrical interface. The following examples show typical standard versions from our in-house production.








Tubular heaters can be bent to customer drawings and adapted to the application. Bending radius, cold ends and connection position are specified as part of the engineering process.



Ihne & Tesch tubular heaters for a wide range of industrial applications:
Data sheet and technical documentation for tubular heaters
Ihne & Tesch tubular heaters are tube-shaped electric heating elements with magnesium-oxide insulation and a NiCr heating conductor in a stainless-steel sheath. They are used in liquid baths, air heaters, hot-runner manifolds, screw-in and flanged heaters, heating banks, heat exchangers, flow heaters and tool heating. They also form the basic element for manufacturing cast-in heaters.
Depending on the sheath material, Ihne & Tesch tubular heaters can operate at temperatures up to 950 °C. Material 1.4541 is designed for 750 °C, 1.4571 for 850 °C and 1.4828 for 950 °C. The precise limit depends on diameter, connection design and operating environment.
Standard diameters are 6.5 and 8.5 mm, with other diameters available on request. Double-ended versions are available in lengths from 300 to 6,000 mm; single-ended 8.5 mm versions are available up to 2,500 mm. Length tolerance is ±10 mm up to 1,000 mm and ±1% above 1,000 mm.
Connection designs are available with protection ratings up to IP67. Explosion-protected versions with ATEX certification are available on request for hazardous areas in the chemical, pharmaceutical and food industries.
Ihne & Tesch manufactures tubular heaters with various screw-in threads, connection cables, limiters or thermostats, and temperature sensors in sensor tubes. Operating voltage can be specified up to 500 V, subject to technical feasibility.
Yes. Tubular heaters are manufactured at our own plant. This enables flexible custom dimensions, reliable quality assurance and short lead times. They also form the basis for our in-house cast-in heater production.