Met One GT-526 Six Channel Handheld Laser Particle Counter


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The GT-526 is a full-featured, battery-operated, portable laser particle counter that provides the functionality of a bench unit with the convenience of a handheld! It can data-log particle counts continuously or send them to a network.


  • Six Particle Channels
    Six preset particle channels (0.3, 0.5, 0.7, 1.0, 2.0, 5.0) show cumulative counts in real time, with selectable count units.
  • Menu-Driven Command Set for Out of the Box Operation
    A simple touch of a button sets sample time, and basic setup parameters such as date/time and communications settings. Remote operation via RS–232 or RS–485 communications port allows extensive control, including all front-panel operations.
  • Flexible Data Interfaces
    Stores up to 8,000 records for printer output, Excel® formatted output, or networked datalogging via the included single computer software (Comet)
  • 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.



    Particle Size Ranges  6 channels – 0.3 μm, 0.5 μm, 0.7 μm, 1.0 μm, 2.0μm and 5.0 μm
    Concentration Range 0 – 3,000,000 particles per cubic foot (105,900 particles/L)
    Accuracy Accuracy  ± 10%, to calibration aerosol
    Sensitivity 0.3 μm with 2 to 1 peak to valley (JIS), 2 to 1 S/N
    Sample Time Adjustable: 1 to 999 seconds
    Light Source Laser diode, 30 mW, 780 nm
    Flow Rate 0.1 cfm (2.83 lpm)
    Display 16-character x 4 Line LCD
    Connectivity RS-232 or RS-485 Half Duplex
    Data Storage Up to 8,000 Records
    Operating Temperature 0˚ to +50˚C
    Storage Temperature -20˚ to +60˚C
    AC Adapter/Charger AC to DC module, 100–240 VAC to 9 VDC @ 350 mA typical
    Battery Life Up to 17 hours of continuous use; up to 11 Hours intermittent Use
    Battery Type 6v NiMH
    Battery Recharge Time 15 Hours Typical
    Physical Dimensions 6.25” (15.9 cm) H x  4.0” (10.2 cm) W x 2.1” (5.4 cm) D
    Weight (with battery) 1.94 lb   (31 oz)   (0.88 kg)
    Certifications Meets or exceeds CE, ISO, ASTM, and JIS international certifications
    Warranty Warranted by Met One Instruments for 1 year against defects in workmanship.

    Each Met One GT-526 is shipped complete with:

    • Operation Manual
    • Custom Serial Cable
    • Communication Software (Comet)
    • AC to DC Converter Module with IEC AC Power Cord
    • Isokinetic Sample Probe
    • Screwdriver
    • Carrying Case
    • Zero Particulate Filter
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