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Specification

Bench unit performance in the palm of your hand.

Big Performance, Small Size
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 GT-521 :
OPERATING PRINCIPLE Counts individual particles using scattered laser light

PERFORMANCE :
Particle Size Range : Two channels�from 0.3 to 5.0 ¼m (selectable in 0.1 ¼m increments)
Concentration Range : 0 � 3,000,000 particles : per cubic foot (105,900 particles/L)
Accuracy : ± 10%, to calibration aerosol
Sensitivity : 0.3 ¼m
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, 35 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 or RS-485 Half Duplex
Certifications Meets or exceeds CE, ISO, ASTM, and JIS international certifications

INTERFACE :
Display : 16-character � 4-line LCD
Keyboard : 7-key membrane type

PHYSICAL :
Size Height : = 6.25� (15.9 cm) Width = 4.0� (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)