The GT-521 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 datalog particle counts continuously or send them to a network.
Dual Programmable Particle Channels
Two programmable particle channels with a range of 0.3 – 5.0 microns each show differential or cumulative particle counts in real time, with selectable count units.
Simple and Powerful Menu-Driven Command Set
A simple touch of a button sets particle sizes, sample time, alarm settings, and basic setup parameters such as date/time and communications settings. Remote operation via RS-232 or RS-485 communications ports allows extensive control, including all front-panel operations.
Flexible Data Interfaces
Stores up to 4,000 records for printer output, Excel® formatted output, or networked datalogging via the included single computer software (GT-Comm).
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.
Specifications:
| Operating Principle | Counts individual particles using scattered laser light |
| PERFORMANCE | |
| Particle Size Range | Two channels-from 0.3 to 5.0 μm (selectable in 0.1 μm increments) |
| 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 | Adjustable: 6 to 999 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-provide 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 or RS-485 Half Duplex |
| Certifications | Meets or exceeds CE, ISO, ASTM, and JIS international certifications |
| INTERFACE | |
| Display | 16-character LCD x 4-line LCD |
| Keyboard | 7-key membrane type |
| PHYSICAL | |
| Size | Height=6.25" (15.9 cm) Width=4" (10.2 cm) Thickness=2.1" (5.4 cm) |
| Weight | 1.94 lb (31 oz) (0.88 kg) |
| ENVIRONMENTAL | |
| Operating Temperature | 0° to +50°C |
| Storage Temperature | -20° to +60°C |
| ACCESSORIES | |
| Supplied | Operation Manual Custom Serial Cable Communication Software (GT-Comm) AC to DC Converter Module with IEC AC Power Cord Isokinetic Sample Probe Screwdriver Carrying Case Zero Particulate Filter |
| Optional | RH & Temperature Probe (Met One Part Number G3120) Flow Meter (Met One Part Number 9801) Portable Printer (Met One Part Number G3115) |
Datasheet