Get exclusive volume discounts, bulk pricing updates, and new product alerts delivered directly to your inbox.
By subscribing, you agree to our Terms of Service and Privacy Policy.
Direct access to our certified experts
| OPERATING PRINCIPLE | Counts individual particles using scattered laser light |
| PERFORMANCE | |
| 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 particles/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) |
| ELECTRICAL | |
| Light Source | Laser diode |
| Power | 6V 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 certifications |
| 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 | 0° to +50°C |
| Storage Temperature | -20° to +60°C |
| ACCESSORIES | |
| Supplied | Operation Manual Custom Serial Cable AC to DC Converter Module with IEC AC Power Cord Isokinetic Sample Probe Screwdriver Carrying Case Zero Particulate Filter |
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.
Fast Sampling
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.
Simple Operation
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.
