0191 5166636 enquiries@ht-uk.com

The Watlow HT FIREROD® cartridge heater is especially designed for high-temperature platen applications up to 1600°F (871°C). The HT FIREROD high temperature cartridge heater utilizes the same industry leading design principals used on all of Watlow's FIREROD products. Taking the cartridge heater one step further enables the HT FIREROD to withstand application temperatures up to 400°F (204°C) higher than standard cartridge heaters.

There are certain differences in the HT FIREROD design which are important in high temperature applications:

  • HT FIREROD cartridge heaters are specially constructed with an end seal that is virtually airtight to reduce the effects of resistance wire oxidation
  • The high temperature sheath is treated to improve its emissivity for better heat transfer


Material Maximum Operating Temperatures Maximum Watt Densities
°F °C W/in2 W/cm2
Platen  1800 982 100 15.5
  • Platen temperatures to 1600°F (871°C)
  • Maximum watt density to 100 W/in² (15.5 W/cm²)
  • Maximum voltage 277VAC to ground
  • Length tolerance: +0, -4 percent standard diameters; +0, -8 percent for special diameter


  • Thermo plastic
  • Super plastic forming of titanium aircraft parts
  • Diffusion bonding to laminate and shape titanium

Features & Benefits:

Features Benefits
High-temperature seal
  • Reduces exposure to the atmosphere which minimizes oxidation of the winding wires resulting in longer life of the element Note: First 2 in. (51 mm) must be outside the platen in free air.
Alloy 800 sheath
  • Transfers heat more efficiently
High emissivity sheath
  • Provides better heat transfer and longer life