Air Quality | Indoor Particle Counters
Introducing the Model 804 four channel particle counter... Accurate – Affordable – Reliable
The Model 804 Four Channel Particle Counter gives you portability and reliability at the lowest price in the industry. Fast sampling, simple operation, USB interface and data storage in a sturdy yet lightweight package. Contact handhelds@metone.com
Met One Instruments BT-637
If particulate levels and indoor air quality remain critical, the Met One Instruments BT-637 is the right choice. The unit was designed to meet the needs of monitoring professionals in any indoor environment or process verification application.
Met One Instrument’s particle counters and dust monitors are designed primarily for use in controlled environment applications. Particle counters detect and measure individual particles as small as 0.3 microns in diameter. Dust monitors feature particle mass concentration reporting. Specific product information is available below and in a comparative product table
Our particle counters include all the necessary components to start sampling immediately. No extra or hidden costs. We do offer some optional accessories to enhance the operation of our units.
![]() |
![]() |
![]() |
![]() |
||||||
| GT-321 Single Channel Particle Counter |
GT-521 Two Channel Particle Counter |
GT-526 Six Channel Particle Counter |
Aerocet 531 Mass Particle Counter / Dust Monitor |
BT-637 Six Channel Bench Top Particle Counter |
|||||
| Model 804 Four Channel Handheld Particle Counter |
|||||||||





