ATEX Ex Certification

The acronym ATEX (from the French “ATmosphères EXplosibles“), identifies the European regulation (mandatory) concerning “Devices and protection systems intended to be used in potentially explosive atmospheres” (currently, Product Directive 2014/34 / EU).

All ATEX heaters manufactured by MASTERWATT for hazardous areas within the European Union are certified to the ATEX Equipment Directive 2014/34 / EU and are labelled with the EX logo. MASTERWATT offers a full range of ATEX industrial electric tank immersion heaters, process flow heaters and electric heating skids for a variety of applications in hazardous areas.

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

MASTERWATT manufactures its full range of ATEX certified electric heater in accordance with flameproof and increased safety requirements, thus making them suitable for the use in hazardous areas.

MASTERWATT heaters for hazardous areas are CE marked and comply to the requirements of the ATEX Directive 2014/34 / EU; they are certified for use in Zone 1 and Zone 2 hazardous areas.

ATEX 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