4–4 AeroTrak™ Remote Airborne Particle Counters
Tubing Installation
Connecting Vacuum Tubing
For simplicity and reliability, the remote particle counter does not include
an internal pump to move particles through the instrument. Instead, it
uses a critical or sonic orifice to maintain a steady flow of air and
particles.
This requires a vacuum source from a central vacuum system or an
external vacuum pump capable of delivering at least 15 inches of
Mercury (15 inHg) at the outlet of the counter. The vacuum should be
confirmed using an external vacuum gauge.
Connect the vacuum tubing to the particle counter at the vacuum inlet
shown in the figure below. This requires tubing such as specified in the
optional accessories table in Chapter 1 or PVC thick-walled tubing.
Connecting Vacuum Tubing to Remote Airborne Particle Counter
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