C H A P T E R 1

Product Overview

This chapter contains an introduction to the Ultrafine Particle Monitor - Model 651 and provides a brief explanation of how the instrument operates.

P r o d u c t D e s c r i p t i o n

The Model 651 is a continuous laminar flow condensation particle counter that uses water as its working fluid. The Model 651 provides rapid, high-precision measurement of the numbers of ultrafine (down to 7 nm) airborne particles. The instrument delivers robust field performance in both pristine and heavily polluted areas and can be used for a variety of applications including ambient monitoring and research, indoor air quality investigations, atmospheric and climate research, and health effects studies. TAPI recommends annual maintenance and calibration for the Model 651.

Features of the Model 651 include:

6-inch color touch screen with a graphical interface displaying particle concentration, total counts, and a plot of concentration vs. time.

7-nm detection.

Single-particle counting to 106 particles/cm3.

Continuous, live-time, electronic processing for maximum accuracy.

Adjustable inlet flow (3.0 or 0.6 L/min), inlet location (front or back), and water supply connection (front or back).

Flexible data acquisition options including USB stick, Ethernet, USB port, and RS-232 port.

Advanced instrument diagnostics including a novel pulse height analyzer to monitor super-saturation state, wick health, and instrument status.

Newly designed air flow, wicking, and water handling systems.

Option to mount in a rack with included hardware.

07506C DCN6727

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Teledyne 651 operation manual Product Overview, O d u c t D e s c r i p t i o n, A P T E R