caa a22 4500 467904561 CHVBK 20180406152830.0 cr unu---uuuuu 170328e20060301xx s 000 0 eng 10.1007/s10661-006-3264-x doi (NATIONALLICENCE)springer-10.1007/s10661-006-3264-x Airborne Dust Particle Counting Techniques [Elektronische Daten] [S. Sharma, B. Prasad] The paper briefly describes an electro-optical system for counting of dust particles, which is based on the scattering phenomena. Utilizing the scattering of light by various size particles present in the environment, various particle counting techniques have been developed in order to measure the scattered intensity of light. Light scatters in all directions but much more in the so-called near forward direction 17∘ off axis, at 163∘ from the light source in the visible range. On the basis of two techniques, the right angle and forward angle scattering, opto-mechanical systems have been developed which measure scattered intensity and particulate matter. The forward scattering Nephelometer is more sensitive and therefore is more suitable for pollution monitoring than the right angle scattering Nephelometer. Whereas the right angle scattering Nephelometer has the utility in extremely low concentration in ppb level owing to the excellent light trap efficiency in comparison to forward scattering Nephelometer. In this paper measurement techniques and measurement results associated with design and development of a real time particle analyser are also discussed. Springer Science + Business Media, Inc., 2006 Nephelometer nationallicence Rayleigh and Mie scattering nationallicence right angle scattering nationallicence scattering nationallicence Sharma S. Environmental Monitoring Instruments Division, Central Scientific Instruments Organization, 160 030, Chandigarh, India aut Prasad B. Environmental Monitoring Instruments Division, Central Scientific Instruments Organization, 160 030, Chandigarh, India aut Environmental Monitoring and Assessment Springer Netherlands 114/1-3(2006-03-01), 191-198 0167-6369 114:1-3<191 2006 114 10661 https://doi.org/10.1007/s10661-006-3264-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10661-006-3264-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sharma S. Environmental Monitoring Instruments Division, Central Scientific Instruments Organization, 160 030, Chandigarh, India aut NATIONALLICENCE 700 1- Prasad B. Environmental Monitoring Instruments Division, Central Scientific Instruments Organization, 160 030, Chandigarh, India aut NATIONALLICENCE 773 0- Environmental Monitoring and Assessment Springer Netherlands 114/1-3(2006-03-01), 191-198 0167-6369 114:1-3<191 2006 114 10661 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer