FIREROD Cartridge Heaters

The Watlow FIREROD revolutionized the heating element industry in 1954 when it was patented as the first swaged cartridge heater. Applications: Molds, Dies, Platens, Hot Plates, Sealings, Fluid Heating, Life Sciences, Aerospace, Semiconductor, Foodservice Equipment.

Code Numbers
Ordering Options


HT FIREROD – Cartridge Heaters- Made to Order

HT FIREROD – Cartridge Heaters – High temperature seal prevents exposure to the atmosphere which minimizes oxidation of the winding wires. The end result is longer life of the element. Incoloy sheath is treated for better emissivity, which transfers heat more efficiently.



FIREROD Immersion Cartridge Heaters

FIREROD immersion heaters package to 300 W/in2 (46.5 W/cm2) in a compact unit.  This design solution is ideal for replacing large screw-plug immersion heaters.

Code Numbers


Miniature FIREROD

This miniature cartridge heater is capable of high operation temperature and provides long life in applications where it is essential to have a very small size. Applications: Gas Chromatographs, Ink jet printers, Packaging, Freeze protection.



FIREROD Bolt Cartridge Heaters

Available with conduit box and wooden handle, when it is inserted into a hollow bolt this heater lengthens the bolt by heat expansion allowing the nut to be further wrench-tightened.

Code Numbers


Metric FIREROD Heaters

Available in 6.5mm, 8mm, 10mm, 12.5mm, 16mm, and 20mm diameters. Like its counterpart, the metric FIREROD consistently outperforms other cartridge heaters because of design solutions like its exclusive resistance wire winding process.



Versaline Circulation Heaters

The VERSALINE 500 is a chamber assembly for in-line heating applications. This heating package is ideal for situations where a high watt density circulation heater is required but space is limited.