Featuresit is designed according to the principle of multi jet holes particle impact and isokinetic sampling. And it gets the consistence of animalcule more accurately.it is an ideal air biological sampler for medicine plant, hospital, biological products, food machining, public place, etc. 1. Sampling hole has many small holes to reduce particles superposition and reduce error of animalcule count.2. Programmable, sampling quantity can be set from 0.01 to 6.0 m3 (bk-bas-iv), 0.01 to 9.0m3 (bk-bas-v).3. Lcd screen displays sampling quantity, sampling time, etc.4.sampling time can be set automatically.5. Up to 256 samples data storage of sampling time, sampling volume and other parameters.6. Easy to change petri dish, just only take down sampling hole to change petri dish. (diameter:9015mm) modelbk-bas-ivbk-bas-vsampling volume100lminflow velocity of sampling holes0.4ms0.38msbasically the same as the clean room (isokinetic sampling)materialaviation aluminumsus304 stainless steelstructurepc board control, low noise pump samplingrechargeable batterydc7.4v6800mahdc14.8v5000mahoperating time on battery(h)6-8power supplyac110v220v10%, 50hz60hzexternal size(l*w*h)mm120*195*300235*220*180package size(l*w*h)mm190*380*420400*380*220net weight(kg)2.5 4.8gross weight(kg)68.5