Engineered Heaters and Controls.



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EML Manufacturing can design and built your general purpose or heater control panels. Our control panels are built to National Electric Code (NEC), International Electrotechnical Commission (IEC) standard or ATEX Directive as specified.  We can supply control panels from indoor area to a hazardous area on any offshore platforms.  We utilize high quality components and workmanship to ensure reliability and performance. 

EML Manufacturing is UL and CUL (Canada) Listed control panel shop with the following listing


  • UL-508A and CUL-508A Industrial Control Panel
  • UL-698A and CUL-698A Industrial Control Panel with Intrinsic Sate extension to hazardous location.
  • UL-1203 / 496 and 1203 / 496 Industrial Control Panel for Hazardous Location. Explosion proof and purge enclosure.


Commonly specified control panels include:

Indoor Nema 12  IP51 Painted Carbon Steel General Purpose
Indoor Nema 4  IP66 Painted Carbon Steel Hose Down
Outdoor Nema 4  IP66 Painted Carbon Steel Hose Down
Outdoor Nema 4x  IP66 316/L Stainless Steel Hose Down, Corrosion Resistant
Outdoor Nema 4x Purged  IP66 316/L Stainless Steel Hose Down, Corrosion Resistant, Hazardous Area.
Outdoor Nema 4/7  IP66 Copper Free Aluminum Hose Down, Hazardous Area.
Outdoor Nema 4x/7  IP66 Copper Free Aluminum Hose Down, Corrosion Resistant, Hazardous Area.



Nema 4/7 Control Panel


Heater Control Panel

Our heater control panels are design to provide accurate and safe controls for an electric heater.  The internal of the control panels consist of three independent but inter-related systems.  They are control system, safety shutdown system and power distribution system.  The control portion would handle all logic, remote interface and temperature control loop.  The safety shutdown system is design to monitor and shutdown the heater during unsafe operation.  Finally, the power distribution portion would regulate the electrical power to the heater based on the requirement from the control system.

Supply voltage can vary from single phase 120/240VAC to three phase 380/415/480/600 and 690VAC. Harmonics can be an issue with the power distribution system if the heater is the major load on the power distribution load.  Symptoms of harmonic issues include flickering of facility lighting, unstable generator operation, overheating, and et cetera.


General Purpose Control Panel

Contact us for your general purpose control panel requirement.  We can built from simple relay logic, loop controls to PLC capability.