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Aerocet 531S Handheld Particle Counter

Aerocet 531S Handheld Particle Mass Profiler & Counter

The Aerocet 531S is a full–featured, completely portable, battery operated, handheld mass monitor or particle counter. This unit provides particle counts or mass PM measurements as stored data logged values, real-time networked data, or printed results.

Operations / Interface

This amazing unit simultaneously measures 6 mass concentration ranges (PM1, PM2.5, PM4, PM7, PM10 and TSP) displayed in mass mode, as well as five popular cumulative particle sizes (> 0.3, 0.5, 1.0, 5.0 and 10.0 microns) in count mode. Using a unique mass conversion, the Aerocet 531S particle counts from eight size ranges which 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”. 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 in an Excel® formatted output. An optional temperature / relative humidity plug-and-play sensor immediately adds ambient temperature and relative humidity capabilities to displayed and logged data.


  • 2-in-1 Performance
  • 6 Mass Ranges (PM1, PM2.5, PM4, PM7, PM10 & TSP)
  • Particle Counting & Mass Monitoring Modes
  • Cost Competitive
  • Keypad Selectable Sizes
  • 1-Year Warranty



Operation Manual
USB Cable
Communication Software (Comet)
AC Adapter / Battery Charger
Iso-kinetic Sample Probe
Carrying Case
Zero Particulate Filter
NIST Certificate of Calibration


RH & Temperature Sensor (P/N G3120)
Flow Meter (P/N 9801)
Portable Printer (P/N G3115)
Serial Cable (P/N 3228)
Wall / Tripod Mount (P/N 8956-1)
G3115 Portable Printer (P/N G3115)


Specifications are subject to change at any time.
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