Chapter 3
40
Sampling Through Inlet Screen Assembly Only
The P-T
RAK
®
particle counter must always be operated with the inlet
screen assembly in place. This mesh screen prevents large particles and
fibers from clogging the sensitive internal components in the
instrument. If desired, you may operate the P-T
RAK
®
particle counter
with
only
the inlet screen and no sampling tubing. This configuration
has the following features:
Advantages Disadvantages/Cautions
Most
efficient (least particle loss).
Not able to pinpoint aerosol
sources.
Fastest response to particle
concentration changes.
Well suited to area sampling.
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