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Instrument Description Teledyne API Ultrafine Particle Monitor - Model 651
38 07506C DCN6727
Internal Instrument Components
Internal components are described in this section and identified in
the photos below.
Figure 4-3
Model 651 Internal Components (viewed from instrument front)
Optics Module
The optics module detects particle droplets from the growth tube.
The optics module contains a laser, photodetector, and the optics,
as well as the detector and optics circuit boards.
Vacuum Supply
An external vacuum supply enables all the flows. The internal
vacuum control valve (controlled by parameters available on the
Filters (x3)