Hazardous Area ‘L’ Immersion Heaters

Product Applications
  • Heating liquids in large tanks or vessels where low levels are commonly experienced
  • Heating liquids in underground tanks

The ISES-L series of hazardous area immersion heaters are ideally suited for installation within process tanks, sited in ATEX / IECEx Zone 1 or Zone 2 hazardous areas. The design of the heater provides horizontal mounting of the elements, beneficial for low liquid level applications but allowing vertical installation, which facilitates withdrawal from the vessel top.

The design of the heater is particularly suited for heating the contents of underground storage tanks.


  • Certified to ATEX or IECEx standards
  • Terminal box is certified weatherproof to IP66/67 or Type 4x
  • Up to 300kW
  • Enclosure manufactured from durable stainless steel with removable cable entry gland; cable entries cut to suit incoming cable requirements, external and internal earth stud


Certifications ATEX / IECEx EX logo II 2 G
Ex e IIC T1 to T6 Gb IP67
EN 60079-0, EN 60079-1, EN 60079-7, EN 60079-31
CU TR (EAC), CCOE, CNEx, Inmetro
Enclosure Stainless steel enclosure with removable cable entry gland; cable entries cut to suit incoming cable requirements; external and internal earth stud
Elements Manufactured from 80/20 NiCr resistance wire with high purity compacted magnesium oxide powder sheathed within corrosion/erosion resistant tube (eg: Incoloy 800/825, 316/316L stainless steel, Inconel 600/625, 321 stainless steel, Titanium, Monel) Element sheath available in welded or seamless tube up to 1.6mm thick
Internals Elements are supported in a segmental or rod type baffle assembly to prevent flow induced vibration and hot spots, generally complying with TEMA standards
Element to Tubesheet Elements are sealed into the flange by welding
Voltage Suitable for voltages up to 690V