Ambient air quality monitoring is required to determine the existing quality of air, and to evaluate the effectiveness of control programme. RESPL used Particulate samplers to determine status and trends of ambient air quality for the study area. Fine Particulate samplers collect particles of 2.5 microns & below on filter paper holder and Respirable Dust samplers collect particles of 10 microns & below on Filter Paper holder. SPM bigger than 10 microns collected in a separate sampling bottle under the cyclone. These samplers are also used to collect gaseous pollutants such as SOx, NOx, Chlorine, VOCs etc, using appropriate absorbing media in Borosilicate glass impingers.

APM 411 TE (Gaseous Sampling Attachment)	APM 460 BL	APM 550 ( For PM 2.5)