What’s characteristic about HLP is its unique heating coil construction. This cartridge heater features a heating coil wrapped around a specially-selected ceramic core which is located close to the walls of the heater pipe. Its circumference is lined with extremely pure MgO (magnesia) for insulation, which is exceptional for its thermal conduction and insulation resistance at high temperatures.

The inside of the heater is structured to be perfectly compressed, so that heat from the heating coil efficiently travels outwards. This keeps the temperature difference to a minimum between the inside of the heater and the heater surface.

The heater can handle extremely high temperatures up to 1830ºF (1000ºC). The maximum watt density is 500 W/in2 (80 W/cm2).

This heater boasts a world-class insulation level of 1000 MΩ (at cold state).

We guarantee that this heater will provide you with the level of heating that you expect.


Thermal gradient is required

  • Coarse-to-fine heat zones

Lead wire pull-out area is limited

  • L-shaped type
  • Bent type
  • Swaged-in type
  • Lead wire right-angle pull-out specifications

Protects the lead wire from heat and impact

  • With flexible conduit
  • With ceramic bead specifications
  • Heat-resistant wire specifications

For taking measures against open circuits [bent wire] due to movement of the lead wire/h3>

  • Bent wire specifications
  • With Y fitting

Waterproof, drip-proof

  • Molded type
  • With heat shrink tubing cover


  • Thermocouple built-in type
  • For vacuum use (hermetic seal)
  • Square sheath type
  • Long heater (maximum of 7.2′ [2200 mm])
  • Pinkie heater (φ1/8″ x 5/8″ [3.1 mm × 15 mm])
  • With flange
  • With screw plug
  • With fins
  • Casted type


Sheath Length* 5/8″ to 7.2 ft. / 15 mm to 2200 mm
Diameter (Φ) (mm) 3.1, 5, 6, 6.5, 8, 10, 12, 13, 14, 15, 16, 18, 19, 20
(inch) 1/8, 1/4, 3/8, 1/2, 5/8, 3/4
Operating Temp.** Up to 1830ºF / 1000ºC
Max. Watt Density 500 W/in2 / 80 W/cm2
Max. Voltage (V)
Max. Resistance Density
Wattage Tolerance +/-10%
Outer Dimension Tolerance 0.00~+0.002″ for dia. / -0.08~-0.02 mm for dia.
Insulation Resistance (MΩ/DC V)*** More than 1000/500
High Pot Test (V/min.) / (V/sec.) 1500 / 1800 with 5 mA

* When a heater is used with over 400ºC, please ask us for advice.
** Depending on how to mount
*** Under a no-heat condition. It might be lowered depending on conditions.

Correlation between Watt Density and Temperature Rising Speed


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