cartridge heaters high density

Finest power distribution and highest surface load


High density cartridge heaters are modern and improved version of standard cartridge heaters. They are designed to withstand high surface loads, thus allowing production of elements with high power and small dimensions. Advanced technology and precise production makes them reliable and indispensable for numerous industrial applications. Ni-Cr resistance wire is wound on MgO core, close to the inner wall of stainless steel protective tube. This design allows excelent heat transfer from wire to tube. Special attention must be paid when preparing holes for heaters (H7 tolerance) and when inserting heaters (heat transfer paste, no gaps). Due to a wide range of semi-finished high density cartridge heaters on stock, we can ship finished products within few days.


  • Plastic and rubber industry
  • Footwear and leather industry
  • Automotive industry
  • Medical and laboratory technology
  • Woodworking machinery
  • Foundries
  • Machine building industry
  • Pellet burners

Technical data

Type of heating

Heating of tools with hole matching H7
Liquid heating
Air heating - forced convection


Tube material:
Stainless steel AISI 316L / EN 1.4404
Stainless steel AISI 309 / EN 1.4828
Incoloy 800 / EN 1.4876

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


Diameter: Ø5mm - Ø25mm (Ø1/4" - Ø1")
Length: 30mm - 450mm

Standard diameter: Ø6.5, Ø8, Ø10, Ø12.5, Ø16, Ø20mm (Ø1/4", Ø5/16", Ø3/8", Ø1/2", Ø5/8", Ø3/4")
Standard length: 40, 50, 60, 80, 100, 130, 160, 200, 250, 300, 350mm

Inactive length at the connection end: Min. 15mm
Inactive length at the other end: App. 5-8mm


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
Connection at one or both ends

Straigth cable outlet (inner contact, outer contact, contact in ceramic bead)
Right angle cable outlet (with tube, with steel block)

Protective connection heads or boxes
Grounded heaters with one connection
Sealing method (ceramic, silicone)

Built in thermocouple (Type J or Type K, grounded or insulated)
With different heating zones and non-heating sections


Surface load: Max. 30W/cm²
Sheath temperature: Max. 750°C
Voltage: 12-480V, standard 230V
Power: 30-3000W, standard 80-2000W

Diameter tolerance: -0.03/-0.10mm
Length tolerance: ±2% (or ±2mm)
Power tolerance: +5% -10%
Resistance tolerance: +10% -5%

Dielectric strength: 1250V
Insulation resistance: >5 MΩ (cold 500Vdc)


  • Possible high surface load
  • The most precise distributed wattage profile
  • Good heat transfer
  • Compact and robust design
  • Easy mount and dismount
  • Wide range of dimensions
  • Special connections and designs are available
  • Thermocouple can be built-in

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