Met One - Particle counter and dust monitor

Products by Category

Ambient Particulate
BAM-1020 Beta Attenuation Monitor
SASS/SuperSASS Speciation Samplers
Portable Ambient Hazards Monitor
E-BAM Mass Monitor
9012 Ambient Aerosol Particulate Profiler
Aerosol Answers
BAM Users
E-BAM Users
SASS Users

Met One Instruments Inc. entered the particulate monitoring market in 1995. In a few short years, we have become a major player in ambient air monitoring around the world. The BAM 1020, the portable E-BAM and the E-Sampler are the preferred instruments for government agencies and industry domestically and overseas. They are user-friendly, accurate, robust, unique and low-maintenance. The E-BAM and E-Sampler technology has no competition.

Comparison of Met One Instruments Air Monitors
Applications Regulatory monitoring, compliance monitoring, AQ Networks. Data may be used for enforcement purposes Emergency response, HAZMAT Response fence-line, Research. Surveying, Fence-line, Industrial Sites
Method Beta ray attenuation Beta ray attenuation Light scatter
Sensitivity Excellent Excellent Very Good
Regulatory Approvals US-EPA Equivalent Method for PM10, TUV in process,JIS Japan, AACMS-1999-2 Korea, UK, NRC Korea AACMS, US Forestry Service Comparison Study US Forestry Service Comparison Study
Portability Easily transportable, requires A/C power, satellite, dial-up, cell-phone, radio-modems available. Completely portable, A/C, battery or solar-panel operation possible. Satellite, dial-up, cell-phone radio modems available. Completely portable, A/C, battery or solar-panel operation possible. Satellite, dial-up, cell-phone radio modems available.

Handheld Particulate
GT-521 Particle Counter
GT-526 Particle Counter

GT-321 Particle Monitor
Aerocet 531 Aerosol Particle Profiler


Met One’s hand held particle counters are primarily designed for use in controlled environment applications. Particle counters detect and measure individual particles as small as 0.3 microns in diameter. Our particle counters contain various size discriminators and counting capabilities to provide hand held solutions for Clean Room Certification, Filter Testing, and Process Testing.
A unique feature of all Met One particle counters is their capability to measure particles in high concentrations. This feature is useful for a number of ambient monitoring applications. The 9012 Profiler for example, is a particle counter that looks for specific particles in high concentration ambient environments.

Met One’s portable dust monitors are used in applications that require total amount of airborne particulate matter. Output is expressed in either micrograms per cubic meter or milligrams per cubic meter. Applications include from industrial hygiene, workplace monitoring, filter testing, and duct testing.

Particle Counters
Dust Monitors      
Model GT-321 GT-521 Aerocet 912 Profiler Aerocet 531
Operation Particle Counter Particle Counter Particle Counter Particle Counter
Particle Size Ranges 0.3, 0.5, 1.0, 2.0, 5.0 microns Any size between 0.3 and 5.0 microns, extended ranges available Six sizes set by Met One for user requirements: available sizes
0.3 to 1.0 in 0.1 increments,
1.0 to 10.0 in 1.0 increments
0.5 and 5.0 microns
Size Selection Keypad selectable to any of above sizes Keypad selectable in 0.1 micron increments Factory set Keypad selectable to any of above sizes
Number of particle counting channels One two Six Two
Mass Size Range       0.1 micrograms/ m3 to 300 micrograms/ m3*
Mass       Mass profiler, automatically provides mass in four size ranges and total mass
Internal Data Logger No Yes No Yes
Computer Connection No Yes Yes Yes
Carrying Case Yes Yes No Yes
Metal Enclosure Yes Yes Yes Yes
Universal 100 VDC to 240 VDC power supply / charger included Yes Yes No Yes

All of the Met One Particle Counters and Dust Monitors have traceable calibration to prime standards.

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Corporate Sales & Service:
1600 Washington Blvd., Grants Pass, Oregon 97526
Phone 541/471-7111, Fax 541/471-7116
Regional Service: 3206 Main St., Suite 106, Rowlett, Texas 75088
Phone 972/412-4747, Fax 972/412-4716