IEC Ex Certification

The International IECEx Certification System (voluntary) was implemented by the International Electrotechnical Commission (IEC) in 2003, in order to facilitate the "Worldwide" commercialization of electrical equipment and components, and services, intended for use in explosive atmospheres.

The IECEx Scheme is accepted in 22 countries in Asia-Pacific, Europe and North America.

MASTERWATT offers a full range of IECEx industrial electric tank immersion heaters, process flow heaters and electric heating skids for a variety of applications in hazardous areas.

Typical applications for certified IECEx heaters include fuel gas heaters, fuel oil heaters, glycol reboilers, TEG heaters, MEG heaters, water heaters, air heaters and heaters for specialised industrial processes.

MASTERWATT IECEx heaters for hazardous areas are certified for use in Zone 1 and Zone 2 hazardous areas.

IECEx Ex-e / ATEX Ex-d / ATEX Ex-de


Hazardous Areas Allowable Characteristics


  • Zone: 1, 2 (explosive gases), 21 and 22 (explosive dusts)
  • Gas Groups: IIA, IIB, IIC
  • Dust Groups: IIIA, IIIB, IIIC
  • Ambient temperatures: -60°C ÷ +70°C
  • IP: 65 ÷ 68
  • Power: up to 5000 kW
  • Voltage: up to 690 Vac/dc