Skip to main content

PCM (Phase Contrast Microscopy)

Technical & Testing
Asbestos Terminology Glossary

Definition

A method of analyzing air samples to count asbestos fibers using a phase contrast microscope. PCM is the standard method for measuring airborne asbestos concentrations and verifying compliance with exposure limits. However, PCM cannot identify fiber type and counts all fibers meeting size criteria, potentially overestimating asbestos fiber concentrations.

Related services:

Asbestos Fiber Counting (PCM)Asbestos Air Monitoring

See also:

TEM (Transmission Electron Microscopy)

The most sensitive and accurate method for analyzing asbestos in air and bulk samples. TEM can identify fiber type, measure very small fibers, and provide definitive asbestos identification. This method is required for final clearance testing after asbestos removal and can detect fibers as small as 0.001 micrometers. TEM is more expensive and time-consuming than PCM but provides superior accuracy.

Browse More Terms

Explore our complete glossary of asbestos-related terminology

View All Terms

Need Professional Asbestos Services?

Now that you understand the terminology, connect with certified professionals for testing, removal, and consulting services.

Get StartedBrowse Services