Heater Catalog - Watlow

Cartridge/Insertion HeatersMetric FIREROD Cartridge HeatersThe Watlow FIREROD not only sets the industrystandard for cartridge heaters, but continues to makeimprovements in construction and design. Among thoseimprovements is the metric FIREROD, a variation of theFIREROD cartridge heater built to meet the exactspecifications of the global market.Like its counterpart, the metric FIREROD consistentlyoutperforms other cartridge heaters with its designsolutions such as its exclusive resistance wire windingand swaging process. These processes bring theresistance wire closer to the sheath and compacts theMgO insulation to maximize heat transfer. The end resultis longer service life and better efficiency.Performance Capabilities• Part temperatures up to 760°C (1400°F) on alloy 800sheath• Watt densities up to 50 W/cm 2 (330 W/in 2 )Features and BenefitsNickel-chromium resistance wire• Assures even and efficient distribution of heat to thesheath because the wire is precisely wound andcentered in the heaterConductor pins• Ensures a trouble-free electrical connection becauseof the metallurgical bond between the conductor pinsand resistance wireMagnesium oxide insulation of specific grain andpurity• Results in high dielectric strength and contributes tofaster heat-upAlloy 800 sheath• Resists oxidation and corrosion from many chemicals,heat or atmospheresMinimal spacing between the element wire andsheath• Results in lower internal temperature• Accommodates a design with fewer or smaller heatersoperating at higher watt densitiesUL ® and CSA approved flexible stranded wires• Insulates the wires to temperatures of 250°C (480°F)6 mm ( 1 ⁄4 in.)No-HeatHeated LengthNickel-ChromiumResistance WireMgO InsulationFiberglass Insulated Crimpedon Leads6 mm ( 1 ⁄4 in.)No-HeatAlloy 800SheathTypical Applications• Semiconductor chamber heating• Semiconductor wafer lead connection• Semiconductor wire and die bonding• Freeze protection and deicing of equipment in coldclimates 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 equipment48 WATLOW ®