MET ONE 3411 Portable Air Particle Counter

No Longer Available for Purchase

The MET ONE 3411 is no longer available for purchase.

Beckman Coulter Life Sciences will continue to offer routine service and calibration for the legacy family of MET ONE 3400 and 3411 products for a period of five (5) years after July 1, 2021. However, breakdown repairs cannot be guaranteed if the required repair component is made obsolete by our supplier.

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Available now
MET ONE 3400+ GMP Cleanroom Routine Environmental Air Particle Counter

The MET ONE 3400+ family has the following advantages over the legacy MET ONE 3400 models:

  • Stronger 21 CFR Part 11 Data Integrity features
  • More ergonomic design

Interested in the MET ONE 3400+ air particle counter?

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Explore MET ONE 3411 Models



  • ISO 14644-1 Class 5 compliant sampling

Data Management

  • Wireless, Ethernet, Serial & USB communication
  • Printed or paperless data output
  • Open communication architecture


  • Up to 6 particle size channels (2.83 LPM flow rate (0.1 CFM)
  • Sequential sampling capability
  • Long-life laser technology for improved performance & lower operating costs


  • Semiconductor cleanroom classification & monitoring
  • Continuous environmental monitoring
  • Process troubleshooting

Product Specifications

Performance ISO 21501-4 unit-to-unit accuracy & reproducibility
Industry Standards ISO 21501-4 , 21 CFR Part 11, ISO 14644-1:2015, FCC, CE
Light Source Helium neon laser
Coincidence Loss % at 1,765,000 particles/m³ (per ISO 21501-4 method)
Sample Volume 5 µm
Throughput 28.32 L per minute
Reporting EU GMP, ISO 146441-1.2015, FS209E, BS5295, ISO 14644-1:1999
Zero Count ISO 21501-4 & JIS B 9921 (1 count or less in 5 minutes; 95% Upper Confidence Limit)
Counting Efficiency 50% at 0.1 μm (100% for particles > 0.15 μm per ISO 21501-4 & JIS B 9921)
Count Alarms Display and Cycles User-defined alarm counts, Raw counts: N/CF, N/CM, N/L in cumulative or differential mode
Item Specifications Referenced 2088800-03

Content and Resources

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MET ONE 3411 PORTABLE AIRBORNE PARTICLE COUNTER Introducing the MET ONE 3411 0.1 micron sensitivity portable airborne particle counter. Unlike many particle counters the MET ONE 3411 fan remains off when operating in a standard semiconductor cleanroom environment, thus particle generation is virtually eliminated.
MET ONE 3411 Air Particle Counter Brochure Brochure for the MET ONE 3411 air particle counter
Certified Calibration Services for MET ONE Calibration services flyer about audit-quality calibrations for your MET ONE air particle counter
Optimizing Workflow Efficiency of Cleanroom Routine Environmental Monitoring Whitepaper by author Tony Harrison, a Compliance and Applications Specialist for Beckman Coulter Life Sciences | Published 2017

Technical Documents