cartridge heaters Low density

Primarly used for tools or solid bodies warming


Low density cartridge heaters are used for lower temperatures and low surface loads. Resistive coils are placed in longitudinal grooves of ceramic bodies, and afterwards bodies are placed in stainless steel tubes. Tubes are filled with MgO, thus providing optimum heat transfer and reliability at reasonable price. Although, this is old and outdated solution, low density cartridge heaters are still in use for all not too demanding aplications. We produce low density cartridge heaters as per customers request and wide stock of raw materials enables us to answer to almost every request in short period of time. For energy saving and longer life time of the heater, it is advisable to bore holes with a tolerance of H7.


  • Heating of tools and machine parts
  • Packaging machines
  • Shoe machine industry
  • Braking systems
  • Compressors
  • Towel dryers
  • Coffee machines

Technical data

Type of heating

Heating of tools with hole
Liquid heating


Tube material:
Stainless steel AISI 304 / EN 1.4301
Stainless steel AISI 316L / EN 1.4404
Stainless steel AISI 321 / EN 1.4541

Flange, plate or nipple material:
Brass or Stainless steel AISI 304 / EN 1.4301


Circular cross section: Ø6mm - Ø40mm
Square cross section: 10x10, 12x12, 15x15mm

Heater length: 30mm - 4000mm

Inactive length at the connection end: Min. 10mm
Inactive length at the other end: App. 5mm


Flanges, plates, rings

Threaded nipples:
Metric: M10x1, M12x1.5, M14x1.5, M16x1.5, M20x1.5
Imperial: 1/4", 3/8", 1/2", 3/4", 1"


Smooth rigid pins (naked or insulated)
Threaded pins, nuts and washers
Tab terminals

Flexible cables for high temperatures:
Up to 180°C - copper wire with silicone rubber
Up to 250°C - copper or nickel wire with PTFE
Up to 350°C - nickel wire with glass fibre
Above 350°C - nickel wire with ceramic beads

Additional cable protection:
Silicone fiberglass sleeve
Braided metal sleeve (in stainless steel)
Armoured metal hose (in zincified or stainless steel)


Standard range or acc. to customer specification
Circular or square cross section
Connection at one or both ends

Straight cable outlet (inner contact, outer contact, contact in ceramic bead)
Right angle cable outlet (directly from opening, with tube, with steel block)

Protective connection heads or boxes
Contacts for sliding supply (for rotating cylinders)
Water-proof head protection (for de-icing)
Sealing method (ceramic, epoxy resin, silicone)

Built in thermostat (suitable for liquid heating)
Built in thermocouple (Type J or Type K, grounded or insulated)


Surface load: Max. 5W/cm²
Sheath temperature: Max. 500°C
Voltage: 12-440V
Power: 5-4000W

Diameter tolerance: -0.02/-0.08mm
Length tolerance: ±2% (or ±2mm)
Power tolerance: ±10%
Resistance tolerance: ±10%

Insulation resistance: >5 MΩ (cold 500Vdc)


  • Easy mount and dismount
  • Wide range of dimensions
  • Lower demands of tolerance on the hole diameter
  • Circular or square cross section
  • Special connections and designs are available
  • Thermostat or thermocouple can be built-in
  • Economical, cost efficient

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