DS-21B-type dust sampler, is the automatic control timer Double Air Road dust detection equipment. The instrument uses films double pump exhaust, two sets of gas composition, gas configuration the gas volume, air resistance, steady stream buffers and other devices, thus ensuring the high vacuum pumping systems, air stability. It is more appropriate than sampling a special trap with a special dust filter. The instrument to achieve a sampling, power, charge integration, the use of more convenient. 
 This instrument is widely used in metallurgy, mining, petrochemical, building materials industry, environmental air quality monitoring. Is the ideal air trap all the dust. 
 How it works: 
 Determination of dust concentration sampler is loaded with a known quality fiber membrane sample in the sampler head, collecting dust containing air, then sampled the incremental membrane, calculated in unit volume of the dust concentration in air. 
 Exhaust pressure> 20000Pa 
 Flow Range 3 ~ 30L / min (adjustable) X2 
 Flow accuracy ± 2.5%  
 Weight 4.5kg 
 Time / accuracy 1-99 minutes 
 Working time ≥ 3 小时 charge 
 AC and DC power supply: 220VAC, 12VDC nickel-cadmium rechargeable batteries 
 Working Noise <75dB 
 Dimensions 210X140X110mm 
 Annex cabinets 1, 1 tripod pay a combined measurement of membrane, the power line 1, 
 Manual 1, sampling the first one, membrane co-2, 1.5A Fuse 2 
 A sampling head rubber gasket