Aerocet 531S Handheld Particle Counter


Amazing Aerocet 531S is a battery-powered handheld mass monitor and particle counter. The instrument measures five particle count sizes (0.3, 0.5, 1.0, 5.0 and 10 micrometers) and six ranges of mass concentration simultaneously, the data is instantly displayed on the screen.

This portable unit manufactured by Met One Instruments is chock-full of features and advantages. Some of its main features are:

Two-in-one operation

Particle mass profiler and particle counter in a single unit. While being small, it provides particle counts or mass measurements of P.M. as stored data-logged values, networked data in real time, and printed results.

Six mass ranges and five particle sizes

Five sizes of popular cumulative particles (> 0.5, 1.0, 5.0 micrometers and 10.0) are displayed in count mode and also six different mass sizes (PM10, PM7, PM4, PM2.5, PM1, and TSP) in mass mode.

Tailored Mass Conversion

Particle counts from eight size ranges are changed to mass utilizing a proprietary algorithm for normal-density aerosols.  The accommodation for especial particulate having various densities is possible via “user-programmable K factors.

Flexible data interfaces

Aerocet 531S stores up to 6,257 records. These files can be seen on the screen, or transferred to a computer by RS232 or USB. The included Comet download utility makes the file transfer easier. Data files can be easily imported into an Excel-formatted sheet.

Temperature and relative humidity option

A ready-to-use option that immediately adds ambient temperature and relative humidity capabilities to the displayed and recorded data.

As a full-featured particle counter, the Aerocet 531S can be applied to industries like Manufacturing, HVAC and Laboratory.

It offers a substantial amount of applications including:

  • Process Control
  • Controlled Environments
  • Indoor Air Quality Monitoring
  • Emission Sampling
  • Hospitals and Clinics
  • Environmental Surveys
  • Filter Testing
  • HVAC Applications (HVAC Control)
  • Dust Monitoring

PM1, PM10, PM2.5, PM4, PM7, TSP

High = 0.3µm, Low = 0.5µm

0 to 1,000 µg/m3

1 minute

0 to 3,000,000 particles per cubic foot (105,900 particles/L)

1 minute

± 10%

User selectable (0.3µm / 0.5µm)

0.1 cfm (2.83 lpm)

High sensitivity: 0.3µm, 0.5µm, 1.0µm, 5.0µm and 10µm, Low sensitivity: 0.5µm, 1.0µm, 5.0µm and 10.0µm

780 nm, 90 mW, Laser diode

7.4V Li-ion battery pack

0.2A, 100-240 VAC, 50/60Hz, Li-ion battery charger

RS-232, USB

Meets or Exceeds CE and ISO 21501

6 hours continuous operation Up to 20 hours of typical (intermittent) operation

16‐character × 4‐line LCD

7-key membrane keypad

2.0 lbs – 32oz (0.9 kg)

Height = 6.25” (15.9 cm), Thickness = 2.1” (5.4 cm), Width = 4.0” (10.2 cm)

0° to +50°C

< 95% (non-condensing)

‐20° to +60°C

Only logged in customers who have purchased this product may leave a review.


Ask About Aerocet 531S Handheld Particle Counter

Have a Tracking Code?

Have you already asked a question? Enter your tracking code in below box.