Photoacoustic measurement system for detecting gases and/or aerosols

摘要

The device has measuring and reference cells formed by a single-sided opened resonance tube, and measuring and reference microphones attached to the cells. A light source (10) emits radiation with a wavelength less than 500 nm to detect white and black smoke, and a light source (11) emits radiation with a wavelength in a range of 3 to 4.8 mu m for detecting flammable substances or hazardous gases.