Testing and monitoring logo

Scanning electron microscopy fibre counting scheme (SEMS) information book for participants

Detailed guidance, including how the scheme operates and hints and tips for participants.

Details

The scanning electron microscopy fibre counting scheme (SEMS) aims to assess the proficiency of laboratories counting asbestos fibres in air using scanning electron microscopy.

Previous AIMS group reports are available on the National Archives website.

Is this page useful?

Updated: 2025-12-15