2026-09-21

New Podcast Episode: #17: DOAS Explained

OPSIS new podcast episode #17 is now available and explores the technology behind Differential Optical Absorption Spectroscopy, better known as DOAS, and how it is used to measure gaseous pollutants in the air.

This episode explains how DOAS uses light absorption to identify different gases based on their unique absorption spectra, or molecular “fingerprints”. Learn how a xenon lamp, spectrometer, and mathematical analysis work together to determine gas concentrations along the light path.

Learn more about DOAS and how this proven technology is used for ambient air quality monitoring and continuous emissions monitoring.

Listen to podcast episode #17: DOAS Explained (same episode in both podcasts)

Podcasts on Air Quality: #17: DOAS Explained
Podcasts on Industrial Gas Monitoring: #17: DOAS Explained