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Principle: 
The particle counter uses a laser light source and collection optics for particle detection. Particles scatter light from the light source in the direction of the collection optics. The collection optics focuses the light on a photoelectric cell that converts the bursts of light into electrical pulses. The pulse height is a measure of particle size. Pulses are counted and their intensity is measured for particle sizing. Results are displayed as particle count in the specified size channel.

Features:
1. 0.1cfm (2.83lpm) flow rate
2. Large LCD display
3. 2 counting modes
4. Six particle-size channels (0.3, 0.5, 1.0, 2.0, 3.0, 5.0µm)
5. Date and time display
6. Federal Standard 209E Calculation  
7. Multiple print-mode
8. Data conversion (cu.ft. and cbm)
9. Data storage

Applications:
Monitor and verify clean rooms
Test filters in place
Track down particle sources
Monitor:
  Laminar air flow and biohazard benches
  Clean room laundries
  HVAC systems
  Computer rooms
  Food and beverage packaging
  Hospitals: pharmacy and surgery
  Indoor air quality (IAQ)
  Aerospace assembly
  Medical device assembly
  Automotive: paint spray booths
  Filter performance