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Immersion Heaters 

Watlow's immersion heaters are designed primarily for direct immersion in liquids such as water, oils, solvents and process solutions, molten materials as well as air and gases. By generating all the heat within the liquid or process, these heaters are virtually 100 percent energy efficient. These versatile heaters can also be formed and shaped into various geometries for radiant heating and contact surface heating applications. UL® and CSA component recognized elements are available.
Product Material  Maximum Operating Temperatures  Maximum Watt Densities 
°F °C W/in2 W/cm2
Screw Plug Immersion Incoloy®   1600   870   120   18.6 
Stainless steel   1200   650   120   18.6 
Steel   750   400   120   18.6 
Copper   350   175   120   18.6 
ANSI Flange Immersion Incoloy®   1600   870   100   15.5 
Stainless steel   1200   650   100   15.5 
Steel   750   400   100   15.5 
Copper   350   175   100   15.5 
Flange Immersion Heaters Incoloy®   1600   870   100   15.5 
304 stainless steel   1200   650   100   15.5 
Steel   750   400   30   4.7 
Copper   350   175   45   6.9 
Over-the-Side Incoloy®   1600   870   60   9.3 
Titanium   1400   760   43   6.7 
Steel   750   400   23   3.6 
316 stainless steel   1200   650   60   9.3 
FIREROD Immersion Incoloy®   212   100   300   46.5 
 

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