Hotwatt, established in 1952, a leader in manufacturing resistance
heating elements for over 60 years, began with the manufacturing of one product, the open
coil heating element. Since then Hotwatt has expanded our product line to include
cartridge, air process, immersion, strip and finned strip, tubular and finned tubular,
band, foil, flexible glasrope«, crankcase and ceramic heaters. We have evolved from a
large supplier of the appliance industry to become a quality supplier to a variety of
OEM's in the industrial, medical, commercial, packaging, Instrumentation, Aviation,
transportation, refrigeration/air conditioning and Military fields. In addition, we can
supply compatible accessory items, which enable us to offer a complete heater system.
Our most popular product is the Cartridge
heater. We make low to medium and high watt density cartridge heaters. Cartridge
heaters provide localized heat to restricted work areas requiring close thermal control.
Dies, platens and a variety of other types of processing equipment are efficiently heated.
Closely controlled work temperatures up to 1400║ F (760║ C) are obtained by a
combination of heater location and proper wattage output.
are ideally suited for heating various liquids. They are available in various sheath
materials and watt densities tailored for your specific applications. Units may be
supplied for single, three phase or three heat operation. The lead end of the unit may be
sealed for extreme environmental conditions.
Air Process Heaters
will provide hot air and gas up to 1400║ F (760║ C) with infinite control by varying the
voltage and air flow. Air heaters are available with various male and female fittings,
hose adaptors (entry only) and flanges. We can also provide temperature sensing control.
Strip & Finned Strip Heaters provide clean, dependable heat with sheath
temperatures up to 1200║ F (650║ C) and watt densities up to 40 watts per square inch.
Finned Strip heaters are available with aluminum or stainless steel fins. Mica Insulated
Strip heaters are also available in various sizes.
Foil & Rope
heaters are a self contained one piece assembly. A resistance element is laminated
between two layers of aluminum foil. This heater is ideally suited for area and surface
heating applications. Operating temperatures up to 300║ F (150║ C). Sizes range from
1.25" to 60" wide with lengths of 4" and up. Glasrope« heaters are
flexible heaters available in various lengths, sheath materials and terminations.
Operating temperatures up to 900║ F (485║ C).
Finned Tubular heaters have built in resistance to impact, vibration, corrosion and
temperature extremes. The heater is swaged, reducing the diameter of the sheath and
compacting the insulation. This insures rapid heat transfer and holds the coil in position
for forming. Many diameters, sheath materials and configurations are available.
Band heaters are
used in multiple applications like cylinders, dies, drums, holding tanks, injections and
blow molding machines, and Plastic Extruders as well as many other applications. The
Hotwatt Standard Band Heaters are manufactured in one or two piece constructions with
maximum inside diameters of 11 1/2" and 22 1/2" respectively. Three or more
sections are employed when heaters of larger diameters are needed (as for blown film
are a ceramic body encasing a resistance element and packed within magnesium oxide.
Temperatures to 1300░F (705░C) for applications like copiers, dehumidifiers, glue guns,
heat sealing tools, instrumentation, resisters, soldering and de-soldering equipment and
are used to overcome the problem of migration and condensation of refrigerant in the
crankcases of compressors used in air conditioning and heat pump systems. They are
designed to keep the crankcase oil at a temperature higher than the coldest part of the
system to prevent migration. They are constructed of the highest quality corrosion
resistance materials and sealed against moisture.
Information section will help you to find your wattage requirements as well as
suggested watt densities. You will also find installation suggestions, ohms law, wiring
diagrams and most everything you will need to find the correct heater for your
In addition, we can supply compatible accessory items
which enable us to offer a complete heater system.