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Strip and Clamp Heaters

375 High-Temperature Strip Heaters


Named for its 0.375 in. (9.5 mm) thickness, the rugged Watlow 375 strip heater is capable of both high temperatures and high watt densities.

Watlow begins construction by accurately placing a coiled, nickel-chromium element wire in the center of the heater. The element wire is then embedded in magnesium oxide (MgO)-based insulation compacted into a solid mass creating excellent heat conductivity and high dielectric strength. The heater is then enclosed in aluminized steel or 430 stainless steel sheathing.

Mineral Insulated Strip Heaters


The MI strip heater is a thin, responsive heater that uses the most advanced heater construction techniques. A nickel-chromium element wire is embedded in Watlow’s exclusive mineral insulation material, which has a much higher thermal conductivity than the mica and hard ceramic insulators used in conventional heaters. This thin layer of insulation brings the element wire closer to the heater sheath. The result is heat flows easily from the element wire to the sheath allowing the wire to run cooler than conventional heaters and increasing heater life.

FIREBAR® Clamp-On Heaters


FIREBAR clamp-on heating elements provide added heating performance over standard round tubular heating elements—especially for immersion applications in petroleum-based liquids that require high kilowatts.

The FIREBAR clamp-on heater's unique flat surface geometry packs more power in shorter elements and assemblies, along with a host of other performance improvements.

-Minimizing coking and fluid degrading
-Enhancing the flow of fluid past the element's surface to carry heat from the sheath
-Improving heat transfer with a significantly larger boundary layer allowing much more liquid to flow up and across the sheath's surface

FIREBAR elements are available in single- and double-ended constructions with one inch or 5⁄8 inch heights. These two configuration variables make it possible to use FIREBAR clamp-on heater elements instead of round tubular elements in virtually all applications.

Thick Film Conduction Heaters


Watlow's 430 stainless steel thick film conduction heaters are ideal for use in many applications where fast response and uniformity are essential. A clamp-on thick film heater provides the best possible combination of heat transfer, thermal efficiency and temperature uniformity.

These high performance film heaters use thick film technology to provide maximum temperature response in a low profile package. This film heater technology can be applied in areas where space is at a premium or where conventional heaters cannot be used because of limited voltage and wattage combinations.

Thick film conduction heaters provide a low-profile heater in a variety of shapes. These shapes include two-dimensional circular and rectangular forms. Due to the direct surface contact, a thick film heater ensures efficient heat transfer through thermally stable substrates and precise resistance trace patterns.