Operation
39
Each of these sampling configurations have specific applications,
advantages, and disadvantages.
Sampling Through Inlet Screen, Tube, and Probe Assembly
The standard sampling configuration for the P-T
RAK
®
particle counter
makes use of the inlet screen, sample tube, and telescoping probe. This
configuration is the easiest to use and is suitable for a wide range of
applications. It has the following features:
Advantages Disadvantages/Cautions
Allows you to sample a pinpoint
source of aerosol.
Small amount of particle loss
through sample tube.
Allows you to reach remote
locations (ceiling diffusers, etc.).
Slight lag time before response
(time it takes for sample to be
drawn through probe and tube).
Allows “hands-free” operation
(attach probe to instrument case).
Sampling Through Inlet Screen and Sample Tube
If you desire to pull a sample from a specific location or from a remote
location (but do not need the telescoping features of the probe), it may
be desirable to remove the probe and use the inlet screen and sample
tube only. This configuration has the following features:
Advantages Disadvantages/Cautions
Allows you to sample particles at a
very specific location (pin-point).
Use supplied sample tube only
(longer tube may impact
sample efficiency).
Allows you to extract a sample
from remote location (filter
sampling, etc.).
More efficient sampling (than with
telescoping probe attached).
Slightly faster response to particle
concentration changes.
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