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Miniature FIREROD® Provides Maximum Performance Where Space Is Limited

The Watlow® FIREROD® not only set the industry standard for cartridge heaters, it continues to make improvements in construction and design. Among these innovations is the 1/8-inch FIREROD. This miniature cartridge heater with swaged construction features high watt density, is capable of high operating temperature and provides long life in applications where it is essential to have a very small size. Like all of Watlow's other FIRERODs, the 1/8-inch contains a resistance wire closer to the sheath and compacted MgO insulation, which maximizes heat transfer


Material Maximum Operating Temperatures Maximum Watt Densities
°F °C W/in2 W/cm2
  1400 760 400 62
  • Maximum Voltage: 240V
  • Maximum Wattage at 240V: 744 W
  • Maximum Amperage: 3.1 amp
  • Wattage Tolerances: +10 percent, -15 percent
  • Dimensions: Lengths less than 1.0 in. (25.4 mm)


  • Burn-in chip test system
  • Mass spectrometry
  • High-definition ink jet printers
  • 3D printing, fused deposition modeling
  • Gas chromatography
  • Respiratory equipment
  • Gas analyzers
  • Freeze protection
  • Packaging

Features & Benefits:

Features Benefits
Miniature size
  • Delivers high performance in a small package
  • Supports a wide variety of application requirements
Low mass
  • Offers better heat transfer
  • Provides quicker response time
  • Increases heater life due to lower internal temperature
Swaged construction
  • Provides higher watt density and higher temperature capabilities
  • Allows maximum heat transfer
  • Increases safety due to low leakage
Optional internal thermocouple
  • Reduces system footprint
  • Measures temperature at point of application
Manufactured to the highest quality standards
  • Outlasts competitors in life testing
  • Backed by 50 years of industry expertise
Numerous lead options available
  • Designed for flexibility and performance