Descriptions:

The GT-321 Handheld Particle Counter is a portable particle counter that counts particles down to 0.3 microns using scattered laser light.
GT-321 Handheld Particle Counter gives you portability and reliability at the lowest price in the industry.

Specifications:

Measurement Method:	Scattered laser light
Particle Size Range:	>0.3, >0.5, >1.0, >2.0, and >5.0 μm (selectable)
Concentration Range:	0 – 3,000,000 particles per cubic foot (105,900 particle/L)
Accuracy:	± 10% to calibration aerosol
Sensitivity:	0.3 μm
Flow Rate:	0.1 cfm (2.83 lpm)
Sample Time:	1 minute total (first reading in 9 seconds, subsequently every 6 seconds)
Hold Time:	Adjustable: 1 to 999 seconds
Electrical
Light Source	Laser diode, 30 mW, 780 nm
Power	6V Ni-MH self-contained battery pack—provides 8 hours of typical intermittent operation, up to 5 hours continuous use
AC Adapter/Charger	AC to DC module, 100 – 240 VAC to 9 VDC @ 350 mA typical
Communications	RS-232
Certifications	Meets or exceeds CE, ISO, ASTM, and JIS international certifi cations
Interface
Display	16-character LCD
Keyboard	2-button membrane
Physical
Size	Height = 6.25” (15.9 cm) Width = 3.65” (9.3 cm)
Thickness	2.0” (5.1 cm)
Weight	1.74 lb - 28 oz (0.79 kg)
Environmental
Operating Temperature	0º C to +50º C
Storage Temperature	-20º C to +60º C