Met One Aerocet-531S Mass Particle Counter/Dust Monitor
Met One Instruments

Met One Aerocet-531S Mass Particle Counter/Dust Monitor

Pine Item #54457

2-in-1 performance!

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 provides particle counts or mass PM measurements as stored datalogged values, real-time networked data, or printed results.

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 (> 0.5, 1.0, 5.0 and10.0 microns) 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 easily be imported into an Excel ® formatted output.

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.


2-in-1 Performance

6 Mass Ranges (PM1, PM2.5, PM4, PM7, PM10 & TSP)

Particle Counting & Mass Monitoring Modes

Cost Competitive

Keypad Selectable Sizes


Controlled Environments

Dust Monitoring

Emission Sampling

Environmental Surveys

Filter Testing

Hospitals & Clinics

HVAC Applications (HVAC Control)

Indoor Air Quality Monitoring

Process Control

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Technical Specifications

Mass Concentration RangesPM1 PM2.5 PM4 PM7 PM10 and TSP
Sample Time - Mass Mode1 minute
Particle Size RangeFour channels—0.5 1.0 5.0 and 10.0 µm
Concentration Range0 -3000000 particles per cubic foot (105900 particles/L)
Sample Time Particle Mode1 minute
Accuracy± 10% to calibration aerosol
Sensitivity0.5 µm
Flow Rate0.1 cfm (2.83 lpm)
Light SourceLaser diode 90 mW 780nm
Power7.4V Li-ion battery pack—provides 20 hours of typical intermittent operation up to 10 hours continuous use
AC Adapter/ChargerL-ion battery charger 100-240 VAC 50/60Hz 0.2A
CommunicationsRS-232 USB
Particle CertificationsMeets or exceeds CE and ISO21501
Mass CertificationsRequires proper use of appropriate K-factors for material being measured
Display16-character x 4-line LCD
Keyboard7-key membrane type
Operating Temperature0° to +50°C
Storage Temperature-20° to +60°C
DimensionsUS: 6.25 x 4 x 2.1 in. Metric: 15.9 x 10.2 x 5.4 cm
WeightUS: 32oz. Metric: 0.9 kg
Manuals & Data Sheets

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