Apparatus for Measuring and Analyzing Airborne Particulate Matter 2.5 and 10
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The development and field testing of the airborne particulate matter sampler and analyzer was presented in this paper. In this study, measuring electrostatic charge of particles technique via high efficiency particulate-free air filter was carried out. The developed analyzer consists of a PM2.5/10 impactor, a particle charger, a Faraday cup electrometer, a flow meter and controller, a vacuum pump, a DC high voltage power supply and a data processing and control unit. It was reported that the developed analyzer was capable of measuring mass concentration of particulate ranging from 0 to 300 µg/m3 corresponding to number concentration of particulate ranging from 106 to 1012 particles/m3 with measurement time about 0.1 sec. The measurement data of the detector can be also interfaced to an external computer via RS-232 port. In this development, the apparatus was applied the energy by a 12 V, 7 A internal battery for continuous measurement of about 10 hour. Finally, the developed apparatus was found to be close agreement with the import standard instrument, portable and benefit for air pollution and particulate matter measurements.
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