Watlow FIREROD Cartridge Heaters

  • Customizable diameters and lead adapters
  • Multiple, independently controllable zones
  • Alloy 800 sheath
  • Nickel-chromium resistance wire
  • UL and CSA approved flexible stranded wires
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Watlow FIREROD Cartridge Heaters are leaders in construction and design for industrial heating applications. Watlow continues to improve in construction and design for all sizes of their cartridge heaters. Their cartridge heaters with swaged construction includes high watt density and is capable of high operating temperatures up to 1400°F. Watlow heaters provide long life in applications with the following supported sizing (1/8″, 1/4″, 3/8″, 1/2″, 5/8″, 3/4″, 1″). Additionally, all of Watlow FIREROD Cartridge Heaters contain resistance wire closer to the sheath and MgO insulations, limiting heat loss and maximizing heat transfer.

Swaged cartridge heaters, first introduced by Watlow, are built with nickel-chromium resistance wire to ensure even efficient distribution of heat to the sheath. As a result, contributing to prolonged heater life and lower energy consumption. ASH Equipment Company sales engineers can help determine if a  cartridge heater is able to tolerate temperature extremes and fluctuations. Watlow offers a High Temperature (HT) FIREROD cartridge heater, designed for high temperature applications up to 1600°F.

We provide engineering and product support for your application.

Watlow FIREROD Cartridge Heaters

1/8″  – max volt 240, ampere max 3.1, length – min: 7/8″ max: 12″
1/4″  – max volt 240, ampere max 4, length – min: 7/8″ max: 36″
3/8″ – max volt 240, ampere max 6.7, length – min: 7/8″ max: 48″, Mineral Insulated
1/2″  – max volt 240, ampere max 9.7, length – min: 7/8″ max: 60″, Mineral Insulated, High Temperature
5/8″ – max volt 480, ampere max 23.0, length – min: 1″ max: 72″, Mineral Insulated, High Temperature
3/4″ – max volt 480, ampere max 23.0, length – min: 1″ max: 72″, Mineral Insulated, High Temperature
1″ – max volt 480, ampere max 23.0, length – min: 1.25″ max: 72″, High Temperature

Additional options available in metric sizing.

Patented Lead Adapters (LA)

Right Angle, Swaged-in Flexible Leads, No-Heat Extensions, PTFE Seal and Leads, Silicone Rubber Seal and Leads, Flange, Locating Ring, Threaded Fitting, Stainless Steel Braid, Stainless Steel Hose, Right Angle Stainless Steel Hose, Right Angle Stainless Steel Braid, Mineral Insulated

Typical Applications of Cartridge Heaters

Watlow FIREROD Cartridge Heaters have a variety of applications, some of which are listed below.

  • Semiconductor chamber heating
  • Semiconductor wire and die bonding
  • Freeze protection and deicing of equipment in cold climates or applications
  • Humidity control
  • Patient comfort heating used in medical devices
  • Mold die and platen heating
  • Seal bars used in packaging equipment
  • Test sample heating in gas chromatography equipment
  • High temperature glass forming equipment



Technical Documentation

Download PDF files:

FIREROD Cartridge Heater Brochure

WatlowCartridge Heater Catalog

Cartridge Heater Metric Sizes

FIREROD Cartridge Heater High Temp Specifications

Watlow FIREROD Cartridge Heater 1/8 in Specifications