Call for pricing
  • Call for availability



  • Watt densities up to 45W/in2 (single-ended) or 120W/in2 (double-ended)
  • Contamination resistant silicone seals
  • MgO insulation improves performance and life
  • 36 standard bend formations
  • A variety of sheath options, termination options and mounting options available
  • UL and CSA approved


Available in single- or double-ended termination styles, the versatile and economical Watlow WATROD® tubular heater lends itself to virtually the entire range of immersion and air heating applications.

The single-ended Watlow WATROD® tubular heater has both terminals at one end. The opposite end is sealed to resist contamination. Standard 12-inch (305 mm) flexible lead wires are crimp connected to the terminal pin and have silicone impregnated fiberglass oversleeves. Single-ended Watlow WATROD® tubular heaters can generate watt densities up to 45W/in2 (6.9W/cm2).

The double-ended Watlow WATROD® tubular heater, with its round cross-sectional geometry, is highly adaptable for bending - especially when bending is performed in the field. Double-ended Watlow WATROD® tubular heaters can generate watt densities up to 120W/in2 (18.6W/cm2).

Both single- and double-ended Watlow WATROD® tubular heaters share many construction features that deliver long life - the resistance wire is centered in the heater sheath and electrically insulated with compacted, high grade magnesium oxide for superior heating performance.

Watlow WATROD® tubular heaters have a variety of mounting and termination options that make them highly popular among industrial customers.

High Temperature Single- and Double-Ended Watlow WATROD® Tubular Heaters

Watlow manufactures high temperature tubular heaters to bridge the gap between standard tubular heaters and Watlow multicell heaters. The new Watlow WATROD® tubular heater is well suited for process air heating applications in excess of 1300°F (704°C), resulting in a maximum sheath temperature of 1800°F (983°C). Controlled lab testing between the new design and current tubular designs show an increase in life of approximately 50 percent.

The high temperature tubular consists of engineered tubing with an outer sheath of Inconel® 600 and a special internal construction. The Watlow WATROD® tubular heater's outer sheath offers high temperature capabilities, reduced oxidation, as well as corrosion resistance.

The new tubular offering is available in 0.430 and 0.375 inch diameters that are configurable either as formed tubulars or process heaters. Watlow WATROD® tubular heaters can also be welded to flanges and plates for mounting purposes. Maximum sheath length available is 275 inches for the 0.430 inch and 0.375 inch diameters.

For applications requiring protection from freezing or condensation, Watlow WATROD® tubular heaters are available with enclosures.


This product can be used in the following applications: