What Is an Immersion Heater?

Experience the power of Sanvi’s stainless steel immersion heaters engineered for rapid, efficient heating directly in heat-resistant vessels. Perfect for water, oils, and chemicals, our heaters deliver consistent performance every time. With a wide range of models and customizable sizes, there’s a Sanvi solution for every application. Heat smarter, faster, and safer.

Electric device that heats fluids or gases by direct contact. Almost 100% energy efficiency because heat transfers directly to the medium. Used in industrial tanks, vessels, pipelines, and domestic water heaters.

How Do They Work?

Electric resistance element produces heat.

Heat is transferred through a protective metal sheath (stainless steel, copper, Incoloy).

Mounted via flanges, screw plugs, or over-the-side designs.

Temperature sensors and thermostats provide control and safety.

Types of Immersion Heaters

Flanged Immersion Heaters

• Welded/brazed to a flange, bolts onto tanks.
• Ideal for large vessels, high kilowatt output, precise control.

Screw-Plug Immersion Heaters

• Threaded plug installation into a tank.
• Good for smaller tanks, process water heating, and freeze protection.

Over-the-Side Heaters

• Hangs over tank side for temporary or removable heating.

Circulation and In-line HeatersFluid pumped through the heater for uniform temperature control

Immersion Materials & Construction

Copper: general water heating

Stainless Steel: corrosion resistance

Incoloy/Inconel: high temperature & aggressive chemicals

Titanium: highly corrosive fluids

Applications

• Industrial & Commercial
• Process tanks and vessels
• Oil & gas heating
• Chemical processing
• Food & beverage
• Water treatment & freeze protection
• Domestic
• Water cylinders as backup heating

Advantages Immersion heater 

• High energy efficiency
• Fast heat transfer
• Precise temperature control
• Low maintenance
• Choosing the Right Heater
• Fluid type → material selection
• Power & watt density → heating speed & efficiency
• Mounting style → screw plug, flange, over-the-side
• Control features → thermostats & sensors

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