GT-526S Handheld Particle Counter

The GT-526S is a full-featured, battery-operated, por6able particle counter that provides the functionality of a bench unit with the convenience of a handheld.


The GT-526S has six programmable particle sizes the operator can set each size from 0.3 to 10 microns. The GT-526S can store up to 8,000 sample events these history events can be viewed, printed on the optional printer and download to a computer using Comet software or simple ASCII terminal commands. The GT-526S has two programmable count alarm limits. Alarms are indicated by an audible beep, displayed message and an alarm flag in the data file. The GT-526S is battery powered with 24 hours of typical (intermittent) operation or 10 hours of continuous operation from a single charge. Recharge time is approximately 2.5 hours. A temperature / relative humidity plug-and-play option immediately adds ambient temperature and relative humidity capabilities to displayed and logged data.


  • All 6 channels counted and recorded at one time
  • Menu driven command set for out of the box operation
  • Bench unit performance in a handheld
  • Affordable
  • User size selectable


  • Controlled Environments
  • Indoor Air Quality
  • Process Control
  • HVAC Applications
  • Filter Testing
  • Compliance Testing
  • Emission Sourcing
  • Remote Sampling


Particle Size Range: 0.3μm – 10μm, 6 channels
Calibrated Sizes: 0.3 μm, 0.5μm, 1.0μm, 2.0μm 5.0μm and 10μm
User Size Settings: 0.1μm steps from 0.3μm – 2.0μm 0.5μm steps from 2.0μm – 10μm
Concentration Range: 0–3,000,000 particles per cubic foot (105,900 particle/L)
Accuracy: ±10% to calibration aerosol
Flow Rate: 0.1 cfm (2.83 lpm)
Data Storage: 8,000 samples
Sample Time: Adjustable: 1 to 999 seconds
Hold Time: Adjustable: 0 to 999 seconds
Light Source: Laser Diode, 90mW, 780 nm
Battery: 7.4V 2,200 mAH Li-ion battery pack. 10 hours continuous operation
Battery Charge Time: 10 hours continuous operation. Battery recharge time is 2.5 hours.
AC Adapter/Charger: Li-ion battery charger, 100 – 240 VAC, 50/60Hz
Communications: USB,RS-232orRS-485
Certifications: Meets or exceeds CE, ISO 21501-4
Display / Keyboard: 16 character x 4 line LCD / 7 key membrane type
Data Memory: 8,000 records
Computer Interface: RS232 / RS485 / USB
Power Supply / Charger: Yes
Cont. Operating Time: 6 hours
Software: Yes
Size: Height: 6.25” (15.9 cm) Width: 4.00” (10.2 cm) Depth: 2.12” (5.4 cm)
Weight: 2.00 lbs (0.91 kg)
Operating Temperature: 0 ̊ C to +50 ̊ C
Storage Temperature: -20 ̊ C to +60 ̊ C
Supplied: Operation Manual (MOI # GT-526S-9800) Serial Cable, USB Cable (MOI # 550065, 500787) Comet Software (MOI # 80248) AC Adapter / Battery Charger (MOI # 390031) Iso-kinetic Sample Probe (MOI # G3110) Carrying Case (MOI # 8517) Zero Particulate Filter (MOI # G3111)
Optional: RH & Temperature Probe (MOI # G3120) Flow Meter (MOI # 9801) Custom Serial Cable (PN 3228) Portable Printer (MOI # G3115) Particle View Software (MOI # Particle View)

Specifications are subject to change at any time