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Airy Technology P311 Handheld Laser Particle Counter
Airy Technology

P311 Handheld Laser Particle Counter

Model P311 Laser Particle Counter
P311 with Case P311 inside Case

Airy Technology P311’ s large color display shows cumulative and differential particle counts of 3 particle sizes simultaneously. The middle particle range can easily be changed by a user. P311’s maximum concentration of 4,000,000 particles/ft3 and up to 8,000 data set record capabilities is the highest in the market. Data can be checked on the unit display and/or easily downloaded to your PC via USB cable and saved as a CVS file which is transferable to Excel.
The P311 is accurate, dependable, user friendly, easy operation, compact and light weight.



  • Selectable Range: 0.3 µm and 5.0 µm fixed 0.5, 1.0, 2.0, or 2.5 µm selectable middle channel
  • Superior Maximum Concentration; 4,000,000p/cf
  • Large LCD Color Display
  • Cumulative and Differential Count
  • Data Download Software
  • USB for Data Download and Power
  • Great Energy Conservation
  • ISO Cleanroom Certification (ISO Class 4>)
  • Point Measurements at Cleanrooms
  • Particle Source Investigation
  • Filter Testing
  • Indoor Air Quality Investigations
  • Quality Control

Included Accessories:

Optional Accessories:

  • AC Adaptor, Isokinetic Inlet, USB Cable, Zero Filter, Software
  • 4 x AA Batteries with Charger, Calibration Certificate, Quick Guide
  • Operating Manual on CD
  • Aluminum Carrying Case
  • Tripod Stand


Front View Side View Rear View
Front View
Side View
Rear View
Large Display Software Screen
Large LCD Display
Software Screen
Adobe PDF File
Technical Brochure
Watch Video


  • Size Range: 0.3-5.0 µm
  • Channel Sizes: 0.3 µm and 5.0 µm fixed; 0.5, 1.0, 2.0, or 2.5 µm selectable middle channel
  • Counting Efficiency: 50% at 0.3 µm; 100% for particles > 0.45 µm (per JIS)
  • Concentration Limits: 4,000,000 particles / ft3 at 5% coincidence loss
  • Light Source: Laser diode
  • Zero Count Level: <1 count / 5 minutes Meets JIS B9921
  • Flow Rate: 0.1 CFM (2.83 LPM)
  • Calibration: NIST traceable / certified
  • Sample Probe/Tubing: Isokinetic sampling probe, Probe for tubing
  • Sampling Modes: Manual, Automatic, ISO Class 4>
  • Sampling Time: 1 second to 99 minutes 59 seconds (Configurable)
  • Sampling Frequency: 1 to 2000 cycles or continuous(Configurable)
  • Sample Output: Internal HEPA filter
  • Vacuum Source: Internal pump
  • Communication Mode: USB
  • Data Storage: 8000 sample records
  • Display: 3.5-inch 320 x 240 Color LCD
  • Power: DC 5V 0.7A (Mini USB TYPE-B)
  • Battery: 4 x AA
  • Battery Life: Up to 4.5 hours of continuous use (LCD Backlight low, 2400mAh Ni-MH Battery)
  • Dimensions (L x W x H): 178 x 90 x 47mm (7" x 3.54" x 1.85") without isokinetic inlet
  • Weight: 480g (without battery)
  • Standards: JISB9921, ISO 21501-4
  • Operating Conditions: 5° to 35°C, 20% to 95%RH non-condensing
  • Storage Conditions: -20° to 50°C Up to 98%RH non-condensing
  • Warranty: 1 year limited warranty

Particle Counters

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