Method and device for measuring the contamination of an atmosphere by aerosols and dusts

摘要

The method involves guiding laser beam toward a measuring chamber loaded with particulate material and dust. The absorption of the beam by the dust is detected by a photodiode (6). The deflection of the beam caused by the dust is detected simultaneously by another photo diode (7). An impact measurement corresponding to contamination of the atmosphere is established from the ratio between the signals of the diodes. An independent claim is also included for a device for measuring contamination of atmosphere by particulate material and dust.