Feature

Selection criteria for pressure sensors in hazardous environments

Selecting pressure sensors for hazardous environments requires a comprehensive understanding of both the hazardous conditions and the technical specifications needed to ensure safety and reliable performance.

07/07/2025 11:19:33

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Hazardous environments are classified based on the presence and frequency of explosive atmospheres, which can be gases, vapours, or dust. These zones – Zone 0, 1, and 2 for gases, and Zones 20, 21, and 22 for dust – dictate the level of risk and the type of equipment protection necessary.

Pressure sensors installed in these areas must comply with relevant safety directives and standards to ensure that equipment does not become a source of ignition. One widely recognised certification scheme for hazardous environments is the ATEX Directive (2014/34/EU). Used primarily in Europe, this specifies requirements for equipment intended for explosive atmospheres.

The most critical factor in selecting a pressure sensor for hazardous environments is its certification. The sensor must have certification appropriate for the zone classification where it will be used. This involves equipment categories that correspond to the zones, with Category 1 for Zone 0, Category 2 for Zone 1, and Category 3 for Zone 2.

Read the full article in DPA's July 2025 issue

Written By Sophia Bell

Sophia Bell is the Group Editor of DPA, Connectivity, and PBSI. She joined the team in 2020 as Assistant Editor after achieving a First-Class Honours BA in English Literature and Film Studies from the University of East Anglia. In her current role, she leads the editorial strategy, driving digital growth and ensuring each title continues to deliver trusted, relevant insight for engineering and manufacturing professionals.