Dust Detective
8
PUF Filter Adaptor
For size-selective monitoring applications, it
is necessary to load the appropriate foam
filter(s) into the inlet adapter. If TSP (Total
Suspended
Particulate)
monitoring
is
required, then no foams should be fitted
within the inlet assembly and the pump run
at 2L/min.
The type of foam filter loaded into the
adapter determines the size of particulate
matter being monitored by the Microdust
Pro and collected on the filter. Although the
PUF foam inserts have been designed as size-selective filters to capture particles larger than a specified mean
aerodynamic size, it is also possible to weigh the PUF inserts before and after measurement to establish both
the total suspended particulate (TSP) value and the desired size fraction.
Inserting / Removing PUF Filters
The PUF filters should be carefully inserted or removed from their respective cassettes using clean tweezers and
plastic gloves. Avoid subjecting the filters to physical damage, creasing or folding. Filters should be loaded into
the relevant housing as shown in Figure 4.
In Figure 5 below, the PUF filter holder is shown (A). To remove it unscrew the locking ring (B). It can be easier
to remove the Microdust probe first by releasing the quick release clips (C). Note the clear cassette (D) can be
removed to fit GFA filters as necessary.
Figure 4
