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BACKGROUND High Volume Air Samplers remain workhorse for air quality moniotring in India. Modification and improvements are done in basic HVS by incorporating a cyclone in the sampler which fractionate ambient air suspended particles into two fractions one upto 10 micron which passes through the cycone and deposited on fitler paper while other above 10 micron which are removed by cyclone get accumulated in the cup fitted at bottom of cyclone. BIS 5182 (Part-23) 2006 has already defined this technolgoy as cyclonic flow technique for Respirable Dust (PM10) Sampling Ecotech developed RDS meeting requirement given in the BIS 5182 (Part-23) 2006. While developing a user friendily RDS provisions are made in the machine for fitting of PM2.5 Sampling Attachment and Gaseous Pollutants Sampling Attachment. Due to provision of fitting of these two attachments AAS 217BL has become an unique system using which one can sample simultanously PM10, PM2.5, SO2, NO2, NH3 and O3. Collected PM10 dust can be analyzed for Heavy metals (Ni, As and Pb) and Benzo(a)pyrene without compromizing requirements given in existing standard methods of these air pollutants. Detailed litrature of PM2.5 Sampling Attachment Ecotech AAS 190 and Gaesous Pollutants Sampling Attachment Ecotech AAS 109 can be referred for specifications of attachments. TECHNICAL FEATURES In AAS 217 ambient air is sucked using low maintenance Noiseless and Brushless blower through corrosion free aluminum modular pipe and pass thorough a sharp cutoff cyclone which divides the particulate matters in two fractions one below 10 microns and another above 10 microns. The Respirable dust (below 10 microns) directly get deposited on filter paper and the coarser dust (above 10 microns) collected in the cup fitted under the cyclone. A time totalizer records the total running time of the blower. A programmable digital timer makes the instrument to stop and start as per requirements set in the timer. The manometric systems indicates the rate of flow in cubic meter per minute which can be read directly on calibrated scale. Ecotech RDS has all branded components and suitable for outdoor field use. Only SS hardware are used in sampler. All Ecotech products are lockable and can be opened by single master key provided with each instrument. User convenience kit with tools operation manual and accessories is also supplied with instrument. SPECIFICATIONS :
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Meet requirements given in BIS 5182 (Part -23) 2006
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Flow Rate :
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0.8 – 1.4 m3 /min free flow
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Suction Pump
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Low maintenance Brushless Blower and Noiseless
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Particle Size :
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Particles of 10 microns & below collected on Filter Paper. Particles bigger than 10 microns collected in a separate sampling cup fitted under the cyclone.
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Sampling Time :
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Can be operated upto 32 hours on continuous basis
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Sampling Time Record :
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0 to 9999.99 hrs. Recorded on a Time Totalizer.
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Particle Size
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Separate provision for collection of Respirable and Non-respirable(less than and greater than 10 microns) size particles.
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Body
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The body of RDS is robust enough to withstand impacts and vibration in transportation it is made of heavy Aluminium sheet.
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Power requirement :
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Nominal 220 V, Single Phase, 50Hz AC mains supply + 3%.
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Size & Weight :
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430 x 320 x 930mm., 40Kg
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Connectivity
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Provisions are existing in the RDS to attach or detach PM2.5 (AAS 190) and Gaseous Pollutants Sampling Attachment (AAS 109) in field.
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