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Immersion Cartridge Heaters

Immersion Cartridge HeatersWATLOW FIREROD® Cartridge Immersion Heaters

FIREROD® cartridge immersion heaters are ideal for replacing large screw-plug immersion heaters. The heater packages up to 300 W/in2 (46.5 W/cm2) in a compact unit, enabling a versatile heating system design. These heaters include a brass or stainless steel 3⁄4 inch National Pipe Thread Taper (NPT) double threaded fitting, which allows conduit boxes to be added. Also, FIREROD immersion heaters are sealed at the lead end with silicone rubber potting. Solid copper leads with silicone rubber sleeves are provided for heavy-duty wiring. These units are recommended for immersion in water or 90+ percent water soluble solutions.

Performance Capabilities

  • Maximum operating temperature in water to 212°F (100°C) at atmospheric pressure
  • Maximum watt density to 300 W/in2 (46.5 W/cm2)
  • Maximum voltage to 480VAC

TEMPCO Hi-Density Cartridge Immersion Heaters

Hi-Density Cartridge Immersion Heaters are designed or heating water and other liquids. The high watt density capability of this heater permits greater heat dissipation in a given area than would a tubular immersion heater. However, it is important to note that allowable watt density depends on the material being heated. For water heating, watt densities, of several hundred watts per square inch are possible; while oil heating may be limited to 5 to 20 watts per square inch.