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Handheld Particle Counter Model P611

Product SKU: P611

Quick Overview

Effectively measure your air quality with the reliable, economically priced Handheld Particle Counter – Model 611. Ideal for validating ISO cleanrooms (Class 5-9) or for investigating air-quality situations. Carried by New Star Environmental, it features everything a particle counter should have with the extra bonus of being portable. User-friendly and easy to configure, plus it’s lightweight at only 1.26 lbs. (or .57 kg); measures 0.3 µm to 10.0 µm with a flow rate of 0.1 CFM (2.83 LPM); stores up to 10,000 sample records that you can either view on the unit itself or access on your computer (via USB cable). Optional temperature and humidity readings available on the color LCD 3.5" screen. Complies with ISO 21501-4 and JIS B9921 standards.

Availability: In stock



The Airy Technology P611 handheld particle counter measures 0.3 µm to 10.0 µm with a flow rate of 0.1 CFM (2.83 LPM). 

Only 1.26 lb (0.57 kg), user-friendly and easy to configure, this handheld particle counter displays up to 6 size channels as well as (optional) temperature and relative humidity on its 3.5” color LCD display. 

The Airy Technology P611 stores 10,000 sample records that can be viewed on the unit or on a computer via USB cable. The P611 complies with ISO 21501-4 and includes a two-year warranty. With excellent quality and reliable performance, the Airy Technology P611 is the best solution for professionals who validate ISO cleanrooms (Class 5 - 9) or investigate indoor air quality matters.


  • Measures 0.3 µm to 10.0 µm
  • 0.1 CFM (2.83 LPM) flow rate
  • Measures 6 channels of simultaneous data
  • Weighs only 1.26 lb (0.57 kg)
  • Long life laser diode
  • USB output
  • Removable and rechargeable AA batteries
  • Includes carrying case, battery charger and download software
  • Stores up to 10,000 sample records and 999 sample locations
  • View data recorded on-screen or via computer
  • (Optional) Temperature & Humidity Probe
  • Large color LCD display
  • Concentration limit of 4,000,000 per ft³
  • Complies with ISO 21501-4 and JIS B9921 standards
  • Reports ISO 14644-1 and EU GMP
  • Lightweight high-impact injection molded plastic enclosure
  • Easy to clean and wipe down
  • Internal audible alarm
  • 2 year limited warranty

Additional Information

Size Range 0.3 to 10.0 μm
Channel Sizes Standard: 0.3, 0.5, 0.7, 1.0, 2.0, 5.0 μm
Standard: 0.3, 0.5, 1.0, 3.0, 5.0, 10.0 μm
Standard: 0.3, 0.5, 0.7, 1.0, 2.5, 5.0 μm
Standard: 0.3, 0.5, 1.0, 2.5, 5.0, 10.0 μm
Optional: additional size channels available
Counting Efficiency 50% @ 0.3 μm; 100% for particles >0.45 μm per JIS
Concentration Limit 4,000,000 Particles/ft³ @ 5% coincidence loss
Light Source Long Life Laser Diode
Zero Count Level <1 count / 5 minutes (<2 particles / ft³) (per ISO 21501-4 & JIS)
Size Resolution <15% at 0.5 μm (per ISO 21501-4)
Flow Rate 0.1 CFM (2.83 LPM)
Flow Rate Control Automatic flow control
Calibration NIST traceable
Sample Probe/Tubing Isokinetic sampling probe and probe for tubing
Sampling Modes Manual, automatic, ISO¹, GMP², cumulative, differential, count/concentration
Reports ISO 14644-1 and EU GMP
Sampling Time 1 second to 99 minutes 59 seconds (configurable)
Sampling Frequency 1 to 9999 cycles or continuous (configurable)
Sample Output Internal HEPA filter
Vacuum Source Internal Pump
Communication Interface USB
Data Storage 10,000 sample records
Security 2-level password protection
Alarm Counts, low battery, flow and laser status
Display 3.5″ (8.9 cm) 320 x 240 Color LCD
Power DC 5V 1A (Mini USB TYPE-B)
Battery Removable AA Ni-MH
Environmental Sensors Optional temperature/humidity probe
Dimensions (L x W x H) 7” x 3.5” x 1.9” (17.8 cm x 9 cm x 4.7 cm) does not include probes
Weight 1.26 lb (.57 kg)
Standards ISO 21501-4 and JIS B9921
Warranty 2 year limited warranty
Operating Conditions 5° to 35° C 20% to 95%RH non-condensing
Storage Conditions -20° to 50° C 20% Up to 98%RH non-condensing
Accessories Operating manual on CD, AC adapter, isokinetic inlet, USB cable, purge filter, data download software, 4 x AA batteries with charger, calibration certificate, carrying case.
Optional Accessories Temperature/Humidity probe, barbed fitting hose adapter

¹ISO 5-9 at 0.3-5.0 µm excluding ISO 5 at 5.0µm
²GMP A-C in operation, A-D at rest