Dust Detective
5
System Overview
The complete system (Part number 206107A) would require the purchase of the static air sampling enclosure
(Part number 206200D), plus the following additional items:-
•
Microdust Pro,
•
Apex2ISPlus air sampling pump and charger
•
Pre weighed GFA filters
–
if gravimetric analysis is required
•
PUF filters
–
if size selection of dust fractions is required
The key component to this accessory is the sampling inlet can utilise Polyurethane Foam (PUF) for size-
selective filter techniques. If used without the PUF filters then total dust levels are sampled. Size-selective
filters were originally developed for operation in the Conical Inhalable Sampler (CIS) as detailed within the
Health and Safety Executive publication MDHS 14/4. The foam filter specifications and dimensions determine
the desired aerosol size selection characteristics and eliminate particle sizes greater than PM
10,
PM
2.5
or
Respirable (4um) as appropriate. The larger particles become trapped and collect within the foam matrix,
whilst al
l particles below these “cut
-
off points” pass through the PUF filters and enter the measurement
chamber, where the
real time mass
concentration is
established.
After passing through
the Microdust Pro,
particulate matter is
deposited on a 37mm
filter which may be
used for gravimetric or
chemical analysis.
Remember however,
although the Dust
Detective system has
been designed to
monitor particulate
fraction concentrations
in a variety of
environments, it does
have some operating
limitations. The
instrument is not
designed to operate
continuously out of doors for long periods over approximately 13 hours.
Figure 2
