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Elmec Speciality Low Density Catridge Heaters are made of helically wound nickel chrome resistance wire evenly stretched and placed in ceramic insulators. The elment assembly is inserted into Brass/SS 304 tube. High grade MgO powder is filled in the remaining space inside the ceramic insulators to increase thermal conductivity, dielectric strength and heater life.


  • Low watt density heaters are available in brass or SS 304 sheath.
  • Medium & Low watt density heaters are available in SS 304 sheath.
  • Braided Wire, straight or right angle exit.
  • Uniform surface temperatures.
  • Flange type optional Braided wire.
  • Max temp for SS tube 400oC, for Brass tube 200oC.


  • Processing machinery.
  • Injection and Blow Moulding.
  • Hot runner bushings.
  • Packaging machinery.
  • For fastening of turbine bolts.
  • Extruders.
  • Hot plates, moulds & dies.
  • Food processing machinery.
  • Medical Equipments.
  • Shoe Machinery.

Mounting Bore

  • The inner diameter of the hole can be between 0.15mm and 0.30mm larger than the cartridge diameter.
  • The lesser the clearance between the  heater and the bore diameter, the longer will be its life.
Sheath Material                                            Cr Ni-Steel
Insulation Material Mgo
Resistance Wire Ni Cr 80-20
Maximum Sheath Temperature 700°C
Die Electrical Strength 800V A/C
Insulation > 5 M W
Thermocouple J type (Standard) or K type
Length Tolerance (Straight) + 5%
Wattage Tolerance + 10% (+ 5% Available Upon Request)
Resistance Tolerance + 10% (+ 5% Available Upon Request)
Unheated Length 35mm (Standard)
Dimensional Tolerance Coil I.D + 0.1 to 0.2mm
Coil Length + 1mm

When Ordering please Specify

  • Dia & length of the heater.
  • Wattage and voltage.
  • Type of terminal.
  • Drawing for special type configuration.
  • Diameter - Min 8mm to Max 45mm.
  • Length - Available in any desired length.
  • Max watt density 3.5 watt/sq cm.
  • For higher wattage and high temperature we recommend high watt density cartridge heaters.

We can manufacture and supply any intermediate diameter and length, Send drawing or sample for special size.

  • Available in Teflon wire, fiberglass wire and nickel chromium wires. Insulated with ceramic beads or fiber glass sleeves.
  • From Dia 22mm onwards, screw connections are available.
  • Send drawing or samples for any specific configuration.
  • Fibre glass or tefflonwire crimped or welded to terminals.