3-1Lasair® Pro Aerosol Particle Counter Operations Manual
How Lasair Pro Works
The Lasair Pro takes in air at a set flowrate dependent on the model (28.3, 50, or 100 LPM)
through the sample inlet to the sample chamber. In this chamber, a laser beam projects a
beam against particles in the sample and causes light scatter. Scattered light is picked up
by the built-in optics collection system and converted to a voltage pulse.
• The amplitude of the voltage pulse corresponds to the size of the particle.
• The number of pulses corresponds to the number of particles.
The incoming particle data is allocated to the appropriate size channel for counting
dierential and cumulative counts. Once the air is sampled, it is pumped from the
sampling chamber to a HEPA-filtered exit.
Standalone or Portable Use
The Lasair Pro particle counter can be used as either a standalone or portable device. As
a standalone particle counter, you can position the unit in a permanent sampling location
or connect tubing to collect air samples from a remote location, such as a cleanroom or
isolator. As a portable device, you can carry the Lasair Pro from one location to another to
sample multiple areas.
Firmware
The internal firmware for collecting, displaying, analyzing, storing, and reporting data is
21 CFR Part 11 compliant. The soware stores up to 10,000 samples, and 100 sampling
recipes and 1,000 locations can also be stored to reduce labor time and potential errors.
Chapter 3
Your System
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