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

Purged & Pressurized solution for TOC analysers


Working with a world leading integrator of analysers to develop an Ex p solution for TOC analysis


Overview & Project Brief

The client is a multi-national integrator of gas and liquid analysers. This case study describes a project to develop custom purged & pressurized (Ex p) enclosures for a number of Total Organic Carbon (TOC) analysers. After the analysers were installed, and the systems inspected and certified, they were shipped to a petrochemical facility in the Middle East for integration into a water treatment facility in an area classified as Zone 2.


  • Thermal management of the enclosures to ensure that the analysers remained in their operating temperature range once installed in a high ambient temperature environment
  • Modification of the analysers to ensure compliance with Ex p standard IEC60079-2
  • Specific project requirements on paint finish
  • The resulting enclosures incorporated a range of thermal management features, including Armaflex insulation, a vortex cooler, as well as anti-condensation heating.
  • Our engineers used their knowledge and experience to advise the integrator on the modifications needed for the analyser to comply with Ex p requirements
  • We worked with a specialist paint shop to meet the paint specification
Expo products and services
  • Custom enclosure design & manufacturing service 
  • Enclosure certification service
  • Thermal management
  • Expo consultancy services
  • MiniPurge type Z
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