Monday, 15 December 2014

Spectrophotometric particle counters

Spectrophotometric particle counters are the main item of cleanroom monitoring technology to have emerged in recent years. The counters can differentiate inert particles from ‘biologic’ particles (where biologic may indicate a microorganism). This article outlines a summary of a study that examined the application of spectrophotometric particle counters for the risk assessment of a cleanroom that underwent deactivation and reinstatement cleaning. The study demonstrates how establishing a particle and biologic particle baseline can provide useful information to compare the environmental condition of a cleanroom pre- and post-maintenance shutdown.


This is the basis of a new article by Tim Sandle for Clean Air and Containment Review. The reference is:

Sandle, T. (2014) Applying spectrophotometric monitoring to risk assessments in biopharmaceutical cleanrooms, Clean Air and Containment Review, Issue 20, pp22-25

The current issue also features a discussion on the application of ventilation equations to cleanrooms, by Bill Whyte and colleagues; a discussion on the chemical influence on ISO 14644 standards by Dick Gibbons; the history of isolator technology by Doug Thorogood; and the history of ultra clean operating theatres by Amanda Parkin…and more.

For details see CACR


For details about Tim Sandle’s study, please contact him directly.

Posted by Tim Sandle