Cartridge / Insertion Heaters

Air Conditioning and Heating Specialists Watlow designed and manufactured the first swaged cartridge heater and revolutionized the heating element industry. With premium materials and tight manufacturing controls, Watlow’s cartridge/insertion heaters provide superior heat transfer, uniform temperatures, resistance to oxidation and corrosion and long life even at high temperatures. Customers benefit from Watlow’s custom designs, on-time delivery, quality and technical assistance. Product Material  Maximum Operating Temperatures  Maximum Watt Densities  °F °C W/in2 W/cm2 FIREROD® Cartridge Incoloy®  1400   760   400   62  Stainless steel   1000   538   400   62  1/8-inch FIREROD® Cartridge Heater Alloy 600   1400   760   400   62  High Temperature FIREROD® Incoloy®   1800   982   100   15.5  Metric FIREROD Incoloy®   1400   760   330   50  MULTICELL™ Alloy   2050   1120   30   4.6