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Simplifying Complexity. Delivering Safety.
Simplifying Complexity.
Delivering Safety.

Developing a hazardous area solution for particle measurement systems

hazardous area solution of particle measuring instruments


Working with one of the leading global manufacturers of precision instruments for use in laboratories and manufacturing applications.



The client had developed a new instrument for real-time analysis of particles in pharma & biotech based manufacturing processes, and came to Expo to develop a version that could be deployed in hazardous areas.


Project Brief

Re-package the existing safe area particle measuring system suitable for use in Class I, Division 1 & Zone 1 hazardous areas, while staying close to the original footprint.


  • The resulting enclosure, suitable for use with a purge and pressurization, needed to maintain the original footprint and form factor as much as possible
  • The system would need to include the means to isolate and control power to the device in order to comply with the various codes & standards. 
  • The enclosure internals would need to be easily accessed for adjustments and maintenance.
  • The solution required apparatus certification for use in various markets around the world. 


  • Working with the client's engineers, Expo designed a new instrument enclosure that was suitable for pressurisation, while allowing access to the internal components. 
  • A custom X purge system and relief valve were integrated into the enclosure alongside the existing instrument components, giving a sleek single-box solution.
  • The completed system was successfully certified for Class I, Division 1 and ATEX & IECEx Zone 1 areas, permitting the client to access multiple markets worldwide.


Expo products and services
  • Custom enclosure design & manufacturing service 
  • Custom purge systems
  • Minipurge interface unit for power isolation, with override facility for maintenance
  • Expo consultancy services

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