Handheld Particle Mass Counter & Profiler

MET ONE Aerocet 531S

Particle Mass Profiler and Counter in a Single Handheld Unit

  • The Aerocet 531S is a small, handheld, battery operated, and completely portable unit. This unit is both particle mass counter & profiler.

Six Mass Ranges and Four Particle Sizes

  • Six important mass size ranges (PM1, PM2.5, PM4, PM7, PM10, and TSP) are displayed in mass mode as well as four popular cumulative particle sizes (0.5μm, 1.0μm, 5.0μm and 10.0μm) in count mode.

Tailored Mass Conversion

  • The particle counts from eight size ranges are converted to mass using a proprietary algorithm for typical‐density aerosols. Accommodation for special particulate with different densities is provided through user‐programmable ‘K‐factors.’

Flexible Data Interfaces

  • The Aerocet 531S stores up to 6,257 records. These records can be viewed on the display, or transferred to a computer via USB or RS232. Our included Comet download utility makes file transfers easy. Data files can be imported into Excel*. Also, print hard copies with the optional G3115 printer.

Temperature and Relative Humidity Option

  • A plug‐and‐play option that immediately adds ambient temperature and relative humidity capabilities to the displayed and logged data.


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Met One 531S Particle Mass Counter & Profiler

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