Ceramic band heaters
Ceramic band heaters from KMT Heiztechnik are robust ceramic-based contact heating elements — made in Austria, in-house since 1987. With operating temperatures up to 450 °C and watt densities up to 6.5 W/cm², they take over where mica reaches its limits.
In production since 1987
The robust solution
for high temperatures.
When temperature, watt density or mechanical stress exceed what mica can handle, ceramic band heaters take over. They too are made in-house to customer drawing — from single units to series production.
At the core is a NiCr resistance wire, form-fitted into ceramic blocks. The ceramic provides electrical insulation, stores heat and releases it evenly to the contact surface. The casing of fire-aluminized steel or stainless steel sheet metal provides mechanical protection and the necessary contact pressure.
Up to 450 °C and 6.5 W/cm²
Higher operating temperature and nearly double the watt density compared to mica — for extruders, injection molding cylinders and processes in the upper temperature range.
Even heat without hotspots
The ceramic blocks act as heat storage and distributor: temperature fluctuations are dampened and heat is released evenly to the contact surface.
Mechanically & chemically robust
The dimensionally stable ceramic body does not yield under clamping pressure, is vibration-resistant and resistant to oils, greases and many process chemicals.
Austrian in-house production
We have manufactured exclusively in-house since 1987. No middlemen, no minimum quantities — direct control over every detail.
Specifications
Technical data
Robust heating elements for demanding thermal applications. Every heater is manufactured individually for you based on these technical standards.
| Casing | Fire-aluminized steel or stainless steel sheet metal |
| Insulation material | Ceramic |
| Heating conductor | Nickel-chromium 80/20 |
| Operating temperature | 450 °C |
| Power | 230V, 400V, 480V or on request |
| Watt density | up to 6.5 W/cm² |
| Power tolerance | ±5% |
| Dielectric strength | 1,000 V AC |
| Connection | Fixed, clamped or plug connections |
Safety notes
Mounting & safety
Proper mounting is a prerequisite for the function, service life and operational safety of your heating system.
!Commissioning: soft-start recommended
We recommend commissioning ceramic band heaters with a soft-start sequence rather than at full power. Ceramic materials are sensitive to rapid temperature changes: a temperature rise that is too fast creates stresses in the ceramic structure that can lead to cracks or fracture.
- Start at reduced power and only move to full power once the heater has warmed through.
- Heat up slowly after extended downtime too — this also drives out condensed moisture.
Ceramic is brittle: it breaks under bending or impact loads where metallic heating elements would merely deform. Impact loading must therefore be avoided not only during mounting but also during ongoing operation — the ceramic can fracture at any time. During mounting, additionally observe: no impact tools, clean and flat contact surfaces, even clamping force — especially with segment heaters — and do not sharply bend connection leads.
Mounting check
- 01Contact surface flat, clean & burr-free
- 02No impact loads — during mounting & operation
- 03Even clamping force — especially with segments
- 04Do not sharply bend connection leads
- 05Route connection leads away from the hot zone
- 06Check insulation resistance before commissioning
- 07Start up with soft-start sequence — not cold at full power
- 08Commission only with temperature control / monitoring
Manufacturing depth
Designs & configurations
Ring heater
Closed ring, slid over a pipe or cylinder. For extruder cylinders, pipelines and laboratory furnaces.
Segment heater
Several ceramic segments form a ring. Mounting and removal without dismounting the cylinder — ideal for large diameters.
Flat ceramic heater
Planar heating surface for flat contact areas. For platen presses, panel heating and laboratory applications.
Special shapes
Custom geometries, split designs or multiple coils for zonal power distribution — to drawing or sample, with no minimum quantity.
Options & fittings
From temperature sensors to cooling housings: we adapt the connection and fittings to your mounting situation.
Expertise
Application areas
Extruder barrel heating
Injection molding barrels (high-temperature)
Pipeline heating in process engineering
Industrial furnaces and chamber ovens
Laboratory ovens and analytical equipment
Chemical process engineering
Hot runner manifolds (high-temperature)
Special-purpose machinery
Technical documentation
* Documentation available on request already now — please use our form.
FAQ
Frequently asked questions
No. We manufacture ceramic band heaters from a quantity of one in our own production facility in Kronstorf — since 1987. Whether a single replacement for an extruder barrel or a series requirement: every heater is built to order to your dimensions.
Three basic designs: round for extruder barrels and pipelines, segmented for large diameters with easy assembly and disassembly, and flat for planar mounting surfaces such as platen presses. We implement bores and cutouts — for example for sensors or mounting brackets — to drawing.
The maximum operating temperature is 450 °C, the maximum surface loading is 6.5 W/cm². The ceramic elements act as heat storage and distributors: heat is transferred evenly to the contact surface, without hotspots.
When higher surface loading is required: ceramic band heaters tolerate up to 6.5 W/cm², while mica band heaters are designed for a guideline value of 3.5 W/cm². Ceramic also offers mechanical hardness, vibration resistance thanks to the form-fit embedded NiCr resistance wire, and chemical resistance to oils and greases. Mica, in turn, scores with a significantly lower overall height. If in doubt, we are happy to advise you on which design fits your application.
Yes, on request we supply ceramic band heaters with a temperature sensor and matching mounting bracket. This lets you monitor the heater itself and reliably protect it against overtemperature. For controlling the process temperature, we recommend an additional sensor in the barrel or tool — the heater reaches temperature faster than the material inside it. Simply state the position and sensor type in your inquiry.
Fixed leads, clamped connections or plug connections — depending on how often the heater needs to be removed and the ambient conditions. Additional options such as a heat conducting plate, thermal insulation or a cooling housing with mounting flange are also possible.
Yes. We measure your old part or work from the nameplate data and manufacture a matching replacement — even for products whose manufacturer no longer supplies them. You can send us the old part directly.
You send us the design, dimensions and electrical data, we check the sizing and clarify details directly with you. You then receive a quote; after ordering, we manufacture the heater in Kronstorf and deliver it fully tested.
Our range
More products
Inquiry checklist
This is what we need for your quote:
- 01Design: round, segmented or flat
- 02Dimensions: for round/segmented, inner diameter × width; for flat, length × width
- 03Voltage and power
- 04Connection type: fixed, clamped or plug connection — incl. exit position
- 05Temperature sensor and mounting bracket required? If so: sensor type and position
- 06Bores or cutouts (position and dimensions)
- 07Operating temperature and environment
- 08Quantity — and, if available: drawing or old part
Request a Product
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