Met One 227A Hand-Held Airborne Particle Counter

Met One 227A Hand-Held Airborne Particle Counter
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Met One 227A
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The Met One 227A Hand-Held Airborne Particle Counter is designed to monitor and test clean rooms, HVAC systems, computer rooms, food and beverage packaging facilities, hospitals, indoor air quality, aerospace assembly plants, auto paint spray booths, and more.


  • AC or internal rechargeable battery operated
  • 0.5 micron at 0.1 cfm
  • Counts 2 sizes simultaneously
  • Stores data from 200 different locations with labels
  • Spreadsheet-compatible data files with optional software


Particle Sizes Channel 1: 0.5 µm
Channel 2: 0.7, 1.0, 3.0, or 5.0 µm
Flow Rate 0. 1 cfm (2.83 lpm)
Outputs RS232C/RS485 (computer or printer)
Location Labels 100
Data Storage 200 samples, rotating buffer
Sample and Hold Times 1 second to 24 hours
Counter Alarms 1 to 9,999,999 each channel
Concentration Mode 1 second samples, 1 to 10 samples averaged
Size 4" W x 6.95" H x 2.3" D (10.3 x 17.5 x 5.9 cm)
Weight 2.1 lbs (0.97 kg)
Included Items:Isokinetic probe (direct mount), purge filter, recharging stand, AC adapter, Operators manual Optional Items:Relative humidity/temperature sensor, high pressure diffuser, Particle Vision PortAll software, printer, and carrying/shipping case