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07506C DCN6727 17
CHAPTER 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.
Product Description
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 10
6
particles/cm
3
.
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.