The reliability you demand at a price you won’t believe!
Small Size—Big Performance
The handheld GT-321 is a portable particle counter that counts particles down to 0.3 microns—giving you portability and reliability at the lowest price in the industry.
Completely Self-Contained—Selectable Particle Sizes
Don’t let the size fool you—the GT-321 is completely self-contained with its own internal battery and sample pump, and is programmable, allowing you to choose your particle size of interest from five sizes: 0.3, 0.5, 1.0, 2.0, or 5.0 microns.
Unlike other counters that can take up to a minute to deliver results, the GT-321 starts delivering volumetric concentration results in about 6 seconds! This facilitates quick multi-site sampling, tracing particle sources and site particle trending.
Only two front-panel buttons control the size channels and sample cycle. The side-mounted power switch allows for convenient thumb operation.
Battery or AC Powered
The self-contained battery pack powers the unit for 8 hours of typical intermittent operation, and for up to 5 hours of continuous use. The included AC adapter operates the counter, even when the battery pack is discharged, and recharges the depleted battery overnight (16 hours) when turned off.
||Counts individual particles using scattered laser light
|Particle Size Range
||>0.3, >0.5, >1.0, >2.0, and >5.0 μm (selectable)
||0 – 3,000,000 particles per cubic foot (105,900 particles/L)
||± 10%, to calibration aerosol
||0.1 cfm (2.83 lpm)
||1 minute total (first reading in 9 seconds, subsequently every 6 seconds)
||6V self-contained battery pack–provides 8 hours of typical intermittent operation, up to 5 hours continuous use
||AC to DC module, 100 – 240 VAC to 9 VDC @ 350 mA typical
||Meets or exceeds CE, ISO, ASTM, and JIS international certifications
||Height = 6.25" (15.9 cm) Width = 3.65" (9.3 cm) Thickness = 2.0" (5.1 cm)
||1.74 lb – 28 oz (0.79 kg)
||0° to +50°C
||-20° to +60°C
Custom Serial Cable
AC to DC Converter Module with IEC AC Power Cord
Isokinetic Sample Probe
Zero Particulate Filter