MOHAMMAD MAHDI Electronics Trading LLC
Met One GT-526S Handheld Particle Counter Review & Specs
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Industrial Air & Cleanroom Monitoring
Met One
GT-526S Handheld Particle Counter Review
A portable, battery-operated six-channel particle counter that combines handheld convenience with bench-unit functionality for controlled environments, HVAC work, filter testing, and compliance monitoring.
Best Fit Users
Engineers, facility teams, QA staff, HVAC technicians, and contamination control professionals.
Professional Introduction
The GT-526S Handheld Particle Counter is a full-featured, battery-operated portable particle counter designed to bring bench-unit functionality into a handheld format. According to the datasheet, it offers six programmable particle sizes, count alarm limits, data storage for up to 8,000 sample events, and an optional plug-and-play temperature and relative humidity upgrade. It is built for users who need reliable contamination monitoring in controlled environments and field conditions.
Quick Verdict
The GT-526S is a strong choice for professionals who need a portable six-channel particle counter with practical battery life, solid storage capacity, alarm functionality, and flexible communications. Its combination of handheld portability and bench-style performance makes it especially attractive for cleanroom support, HVAC diagnostics, and compliance-related particle monitoring.
Product at a Glance
| Product Name | GT-526S Handheld Particle Counter |
| Type | Battery-operated portable particle counter |
| Channels | 6 programmable particle sizes |
| Storage | Up to 8,000 sample events |
| Battery Life | 24 hours intermittent / 10 hours continuous |
| Key Use Cases | Controlled environments, indoor air quality, HVAC, filter testing, compliance testing |
What Is the GT-526S?
The GT-526S is a handheld particle counter used to measure airborne particulate levels across six channels. The datasheet describes it as a “full-featured” portable instrument that gives users the convenience of a handheld device while preserving the functionality normally associated with a bench unit. It is especially relevant in contamination-sensitive environments where fast and repeatable particle counting is needed.
A major advantage of this model is flexibility: users can set particle size channels within the specified range, store sample history, apply alarm limits, and transfer data through multiple communication options.
Why It Matters
For teams working in cleanrooms, HVAC systems, or indoor air quality programs, portable particle counting can speed up inspections, support compliance workflows, and simplify contamination troubleshooting.
Key Features
①
Six Programmable Particle Sizes
The operator can set each size from 0.3 to 10 microns, providing flexibility for different monitoring requirements.
②
Battery-Powered Portability
The unit supports 24 hours of typical intermittent operation and 10 hours of continuous operation, with a recharge time of 2.5 hours.
③
Alarm Limits
Two programmable count alarm limits help users quickly identify when particle levels exceed acceptable thresholds.
④
Data Storage and History
The GT-526S can store up to 8,000 sample events, and sample history can be viewed, printed, or downloaded.
⑤
Optional Temperature and RH
A plug-and-play option adds ambient temperature and relative humidity data to logged and displayed results.
⑥
Flexible Communications
USB, RS-232, and RS-485 communication options support data transfer and integration into workflows.
Technical Specifications
| Category | Specification |
|---|---|
| Particle Size Range | 0.3 µm to 10 µm, 6 channels |
| Calibrated Sizes | 0.3 µm, 0.5 µm, 1.0 µm, 2.0 µm, 5.0 µm, 10 µm |
| User Size Settings | 0.1 µm steps from 0.3 µm to 2.0 µm; 0.5 µm steps from 2.0 µm to 10 µm |
| Concentration Range | 0 to 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, 90 mW, 780 nm |
| Battery | 7.4V 2,200 mAH Li-ion battery pack |
| Battery Life | 10 hours continuous operation |
| Charge Time | 2.5 hours |
| Communications | USB, RS-232, RS-485 |
| Display | 16 character x 4 line LCD |
| Keyboard | 7 key membrane type |
| Dimensions | 6.25″ H x 4.00″ W x 2.12″ D (15.9 x 10.2 x 5.4 cm) |
| Weight | 2.00 lbs (0.91 kg) |
| Operating Temperature | 0°C to +50°C |
| Storage Temperature | -20°C to +60°C |
| Certifications | Meets or exceeds CE, ISO 21501-4 |
Applications
Controlled Environments
Indoor Air Quality
Process Control
HVAC Applications
Filter Testing
Compliance Testing
Emission Sourcing
Remote Sampling
Handheld Operation
Benefits of Using the GT-526S
- Portable design supports field and facility use.
- Six channels give users practical particle-size coverage.
- Large event storage helps with documentation and follow-up analysis.
- Alarm limits improve visibility of threshold exceedances.
- Optional temperature and humidity sensing adds context to measurements.
- Multiple communication options simplify data transfer and reporting.
Pros
- Handheld and battery-operated
- Six programmable particle sizes
- 8,000-sample storage
- Alarm limit functionality
- Optional RH and temperature expansion
- USB, RS-232, and RS-485 communications
Cons
- No specifications beyond the datasheet should be assumed.
- Optional accessories may be required for expanded functionality.
- Best suited for particle counting rather than broader environmental monitoring unless options are added.
Buying Guidance
Choose the GT-526S if you need a portable particle counter for controlled environments, indoor air quality checks, HVAC troubleshooting, filter testing, compliance work, or remote sampling. It is a practical fit for users who want a handheld instrument with storage, alarms, and communication options without moving to a larger bench platform.
FAQ
What is the GT-526S used for?
It is used for particle counting in controlled environments, indoor air quality work, HVAC applications, filter testing, compliance testing, and remote sampling.
How many particle sizes can it measure?
The GT-526S has six programmable channels covering 0.3 µm to 10 µm.
How much data can it store?
It can store up to 8,000 sample events.
Does it support alarm limits?
Yes. The unit supports two programmable count alarm limits with audible and on-screen indication.
Can temperature and humidity be added?
Yes. The datasheet lists a plug-and-play temperature and relative humidity option.
Need Price & Stock Availability?
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July 1, 2026
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