Respirable Dust Sampler
Similar to other models like APM 460BL/NL except that it uses a automatic flow control device to ensure constant flow rate oof 1000 Lpm during the full sampling period
An electronic flow controller automatically maintain constant sampling rate through the filter / cyclone assembly. The size fractionating cyclone of the APM 460 DXNL thus operates close to its designed separation velocity resulting in a sharper cut off for particulates larger than 10 micorns. When the dust load on filter becomes excessive and exceeds the capacity of the blower the electronic circuits provided in the flow controller automatically shut down the machine. To compensate for a variation in filter characteristics the flow controller has a provision to allow adjustment of the sampling rate.
This model is used for highly accurate and precise monitorings prefered by Regulatory Boards & Research Institutes.