Sensitivity range: 0.1 - 10.0 µm

The leader in 0.1 μm air particle counting.

Lasair® III 110 Air Particle Counter

The Lasair® III 110 Air Particle Counter is a laser diode-based true 0.100 μm particle counter with 1.00 CFM flow rate. It provides real-time measurement of yield-impacting particles with three configurations to meet your unique application needs. With a comprehensive set of features and unequaled accuracy, the Lasair III 110 Air Particle Counter offers reduced operating costs and the reliability and longevity to support its three-year laser warranty. The Lasair III 110 Air Particle Counter can be used as a mobile counter to localize source of particles, and it comes with a full range of accessories for monitoring in different applications, including high-pressure gas. It features a chemical-resistant, stainless-steel case that is easy to clean/wipe down and is designed to minimize particle traps. Patented Smart Flow technology eliminates traditional under-counting errors in manifold sampling. Optional on-board batteries provide over seven hours of continuous mobile use, so you can run a sample for an entire shift without having to leave the cleanroom. What does true 0.100 μm air particle detection mean? Call us to find out more!

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  • Diode laser
  • Eight user-adjustable size channels from 0.1 to 5.0 μm
  • Saves up to 10,000 samples for review, sorting, data filtering and printing
  • USB data download to flash memory key
  • Built-in thermal printer
  • Large, 8.4 in. color touchscreen display for simplified use
  • Quiet carbon-free blower/pump for portable applications
  • Integrates up to four environmental sensors; differential pressure, temperature and relative humidity, air flow velocity and more
  • Optional high-efficiency exhaust filter for ISO Class 1-2
  • Available in 12 language so you can use the same instrument and process across language barriers
  • Calculations and reports for ISO 14644-1 or FS 209E
  • Interfaces with FacilityNet Software for comprehensive data management


  • Saving/reloading recipes reduces time to certify your cleanroom, and reduces risk for errors
  • Control cleanroom monitoring remotely via web browser: set-up, sample, display, print, download data and upload sample recipes without having to re-enter the cleanroom
  • Comprehensive data management
  • Data download to Excel or USB flash memory key
  • Use same particle counter for ISO Class 1-9 applications
  • Diode laser eliminates need for frequent, costly laser cleaning
  • Optional critical orifice configuration can use house vacuum for aerosol manifold applications


  • Cleanroom and minienvironment monitoring
  • High-sensitivity applications
  • Facility certification to ISO 14644-1 or FS 209E
  • Troubleshooting/mobile applications
  • Manifold sampling (with Aerosol Manifold II)
  • Process gas monitoring (with High Pressure Diffuser)
  • Ultraclean zones (ISO 1-2)

Supporting Materials

Refer to “Instructions for Programming Recipes and Assigning Locations” for instructions on how to program a recipe and assign it to a location using the Lasair® III Aerosol Particle Counter. Part numbers 1000000975 (cleanroom paper) and 1000009974 (thermal paper) can be used for the Lasair® III Aerosol Particle Counter.

Available Accessories

Printer Paper

Printer Paper

Printer Paper is for use with standard printers, as well as for cleanroom-appropriate devices.

Spare Lithium Battery

Spare Lithium Battery

The Spare Lithium Battery is to keep on hand for replacement power as needed. Also available as a four-pack.

Facility Net Software

Facility Net Software

Facility Net Software provides a solution for comprehensive environmental monitoring, including a real-time and historical data display. Compatible with Particle Measuring Systems particle counters and molecular contamination monitors, as well as various third-party products.

Hand-Held Isokenetic Sampling Probe

Hand-Held Isokenetic Sampling Probe

The Hand-Held Isokenetic Sampling Probe works in conjunction with a 1CFM LASAIR III Particle Counter isokinetic in 90FPM airflow.

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