Indoor Particulate · Particulate Monitors
GT-321 Handheld Particle Counter
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. 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.
Features
- Most inexpensive counter on the market
- Simple Operation
- Fast Sampling
- Battery or AC Powered
- Keypad Selectable Sizes
Operation
The GT-321 has a simple operation with only two front-panel buttons control the size channels and sample cycle. The side-mounted power switch allows for convenient thumb operation. 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. Units are available for same-day or next-day shipping!
Applications
- Controlled Environments
- Indoor Air Quality
- Process Control
- High resistance values to minimize signal line resistance
- HVAC Applications
- Filter Testing
- Laboratory Environments
- Manufacturing Environments
- Emission Sourcing
Product Specifications
| Operating Principle | ||
|---|---|---|
| Counts individual particles using scattered laser light | ||
| Performance | ||
| Count Channels: | 1 (Selectable) | |
| 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) | |
| Concentration Limit: | 3,000,000 / cf | |
| Sample Time: | 1 minute total (first reading in 9 seconds, subsequently every 6 seconds) | |
| Data Memory: | None | |
| Electrical | ||
| Light Source: | Laser diode, 30 mW, 780 nm | |
| 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 | |
| Cont. Operating Time: | 5 hours | |
| Recharge Time: | 15 hours | |
| Software: | No | |
| Power Supply / Charger: | Yes | |
| 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 ̊ C to +50 ̊ C | |
| Storage Temperature: | -20 ̊ C 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 | |
Specifications are subject to change. Contact Belfort Instrument to confirm current specifications.
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