Immersion Heaters for Water, Oils & Process Fluids
Flange, screw‑plug and side‑mount designs with engineered watt density, robust materials and hazardous‑location options.
Finned Heater Product Configurations
Explore Our Range of Efficient, Customizable Heaters for Every Industrial Application
Flange Immersion Heaters
High-power, pressure-rated immersion heaters for large tanks and vessels.
Screw Plug Immersion Heaters
Compact immersion heaters for small to medium tanks.
Side Immersion Heaters
External-access immersion heaters for retrofit and easy maintenance.
Water Immersion Heaters
Immersion heaters designed specifically for water and aqueous media.
Hazardous-Location Immersion Heaters
Certified heaters built for classified or explosive environments.
Custom Immersion Heaters
Fully tailored immersion heating solutions engineered to your specifications.
Immersion Heater Manufacturing Process
Darwinheat immersion heaters are produced using precise materials selection, engineered element insertion, and rigorous testing.
Application Review & Sizing -
Mechanical Design -
Materials & Fabrication -
Assembly -
Testing -
Documentation -
Packaging
Why Choose Darwinheat Immersion Heaters
Darwinheat immersion heaters combine precision design with reliable manufacturing quality to deliver dependable heating performance across fluids and processes.
Material Selection & Watt Density Guidelines
Choosing the right sheath material and watt density is essential for fluid compatibility and heater life.
| Fluid Type | Suggested Sheath | Typical Watt Density | Notes |
| Water / Aqueous | 316L SS / Copper | Lower W/cm² | Focus on scaling control |
| Light Oils | Incoloy 800/825 | Medium W/cm² | Maintain fluid velocity |
| Heavy Oils | Incoloy 825 | Low W/cm² | Prevent overheating |
| Caustic/CIP | Titanium / 316L | Moderate W/cm² | Verify corrosion risk |
| Glycols/HTF | 316L / Incoloy | Moderate W/cm² | Respect film temperature limits |
How to Choose the Right Immersion Heater
Our precision manufacturing process ensures every finned heater delivers reliable performance and extended service life under real working conditions.
Fluid Compatibility
Match sheath material to the fluid (e.g., stainless for water, Incoloy/titanium for aggressive fluids).
Watt Density
Use the lowest watt density that still meets heat requirements to avoid hotspots and premature failure.
Power & Voltage
Select a power rating and voltage that suit tank size and available electrical supply.
Mounting Style
Choose flange, screw-plug, or side mount based on tank design and access for service.
Material & Corrosion Resistance
Pick sheath and fittings with corrosion resistance appropriate to fluid and temperature.
Safety & Controls
Ensure required safety devices and controls (thermostats, level sensors, overheat protection) are included.
What is watt density and why does it matter?
Watt density is the heater’s power output per unit surface area (W/cm²). Correct watt density protects fluid properties and prevents overheating.
Request a Quote or Engineering Support
Get fast, application-specific recommendations and pricing from our heating engineers.