Instrument DescriptionTeledyne API Ultrafine Particle Monitor - Model 651

I n t e r n a l I n s t r u m e n t C o m p o n e n t s

Internal components are described in this section and identified in the photos below.

Filters (x3)

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

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07506C DCN6727

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Teledyne 651 operation manual T e r n a l I n s t r u m e n t C o m p o n e n t s, Optics Module, Vacuum Supply