Met One Instruments, Inc. is in the business of ambient air measurements and air quality monitoring—elements that affect every person on earth. Met One Instruments, Inc. was founded in 1989 with the primary purpose of simplifying and improving the user’s experience. The new company placed exceptional customer service and ease of use at the forefront, introducing new products and services well received in the market. With the company’s increasing reputation for service, reliability, and integrated system solutions, Met One Instruments went through a rapid growth phase.

Met One Instruments Products


Handheld Particles Counter (DR-528)

  • Large, Full-Color LCD Display
  • Menu-driven Multi-Function Rotary Scroll Wheel
  • 10 User-Identifiable Alpha Numeric Location ID’s
  • Integrated RH & Temperature Sensor
  • Intuitive Navigation
  • Integrated Tools Menu to Optimize Device Capabilities
  • Numeric Sample Countdown Timer

Bench-Top Particle Counter (BT-610)

  • Compact/Portable w/built-in printer.
  • Volumetric Flow Control – improved accuracy.
  • Large Display – easily viewed from across room.
  • Improved Software.
  • 2-year Warranty.
Portable Dust Monitor

Portable Dust Monitor

  • The Met One Instruments, INC Portable Dust Monitor is a Nephelometer that offer real-time airborne TSP (Total Suspended Particulate) concentration levels using the principle of forward-laser light scatter.
  • Met One’s forward-laser light scatter technology offers uniquely broad particle size detection.
  • The all-new Aerocet 380 has an ultra-low detection limit, down to 0.1 micron particle size and 1.0 μg/m3 particle sensitivity, with a unit detection range of 0 to 100,000 μg/m3.
  • The continuous flow optical sensor is coupled with purge air ensure accurate measurements in a wide range of environments without performance degradation.
Handheld Aerosol

Handheld Aerosol Mass Monitor

  • The Handheld Aerosol Mass Monitor is a completely portable, full featured, batteryoperated, handheld mass monitor.
  • This device simultaneously provides five critical mass ranges (PM1, PM2.5, PM4, PM10 & TSP) in one minute from start up.
  • Survey the environment with the easy-to-use, extremely portable, size selective Aerocet 831.
  • Weighing only 28 ounces, this compact instrument is the perfect tool for a wide range of assessment applications.
Flow Calibrator

Flow Calibrator

  • The Swift 25.0 is a multi-function, truly portable flow calibrator.
  • Specifically designed to audit and calibrate flow, pressure, and temperature of out higher flow rate ambient air sampling and monitoring instruments.
  • This user-friendly accessory features an easy-to-read display, lightweight and compact size.
  • It is a truly portable device.
Air Flow Meter

Air Flow Meter

  • The Swift 6.0 is a multi-function Air Flow Meter specifically designed for accurate low-rate measurements.
  • The device’s easy-to-read display shows flow rate, flow temperature, and ambient pressure.
  • The Swift 6.0 is a truly portable device weighing only 12 oz, with a size dimension of only 2.75 in. x 1.25 in.
  • Met One’s Swift 6.0 comes complete with a portable kit carry case, including flow adapters and a power cable for USB charging.