Portable Particle Counters 3900 Series — 3905 / 3910 / 3920
Portable particle counters at 28.3 / 50 / 100 LPM with 6.4-inch colour touchscreen and built-in thermal printer. 21 CFR Part 11 compliance option for pharmaceutical cleanroom certification.
Products
| Model | Group | Positioning | Core fit |
|---|---|---|---|
| 3905 | Portable OPC — 1.0 CFM | Portable 6-channel OPC at 28.3 LPM — ISO Class 2 capable | Cleanroom certification, filter testing, pharmaceutical |
| 3910 | Portable OPC — 1.77 CFM | Portable 6-channel OPC at 50 LPM | Faster cleanroom certification, large-area surveys |
| 3920 | Portable OPC — 3.5 CFM | Portable 6-channel OPC at 100 LPM — higher flow for lower classification limits | ISO Class 4–9 large-area, high-speed sampling |
Key Features
Three flow rates — 28.3, 50 and 100 LPM
The 3905 (28.3 LPM), 3910 (50 LPM) and 3920 (100 LPM) allow selection matched to ISO 14644-1 minimum sample volume requirements. The 3920 at 100 LPM dramatically reduces per-sample time in ISO Class 5–6 large-volume rooms, shortening certification campaign duration without compromising statistical confidence.
6.4-inch touchscreen + built-in thermal printer
The large colour touchscreen simplifies sample plan programming in cleanroom gowning. The integrated thermal printer produces on-site paper records at each sample point — essential for immediate sign-off and reducing transcription risk. No need to carry a separate printer.
21 CFR Part 11 electronic records option
Optional FDA 21 CFR Part 11 compliance with electronic signature, tamper-evident audit trail and validated data storage. IQ/OQ documentation kit supports GxP system validation requirements for pharmaceutical facility computer system validation (CSV) packages.
Environmental sensor alongside particle counts
The environmental sensor records air velocity, temperature, relative humidity and pressure during particle counting — combining cleanroom classification and airflow verification in one instrument pass, reducing total qualification time.
Ethernet, USB and memory card for data transfer
Ethernet, USB and an MMC memory card slot support transfer to facility monitoring systems — eliminating post-run USB data download delays in multi-room certification campaigns.
Technical Specifications
Model comparison — 3905 / 3910 / 3920
| Parameter | 3905 | 3910 | 3920 |
|---|---|---|---|
| Flow rate | 1.0 CFM (28.3 L/min) | 1.77 CFM (50 L/min) | 3.5 CFM (100 L/min) |
| Measuring particle size | 0.3, 0.5, 1.0, 3.0, 5.0, 10.0 µm | 0.5, 0.7, 1.0, 3.0, 5.0, 10.0 µm | |
| Counting efficiency | 50 ± 20% at 0.3 µm | 50 ± 20% at 0.5 µm | |
| Concentration limit | 500,000 particles/ft³ at 10% coincidence loss | 300,000 particles/ft³ at 10% coincidence loss | |
Common specifications
| Parameter | Unit | Value / Description |
|---|---|---|
| OPTICAL SENSOR | ||
| Light source | — | Laser diode |
| Zero count level | counts | Less than 1 count / 5 minutes |
| SAMPLING | ||
| Sampling time | — | 6 s to 23 h 59 min 59 s (configurable) |
| Interval time | — | 6 s to 23 h 59 min 59 s (configurable) |
| USER INTERFACE | ||
| Display | — | 6.4 inch colour touch screen |
| Printer | — | Built-in thermal printer |
| Data storage | data points | 10,000 |
| COMMUNICATION | ||
| Interface | — | Ethernet, USB, memory card slot (MMC) |
| DATA INTEGRITY | ||
| Security | — | Password authentication and management, secure data and audit trails (meets 21 CFR Part 11 compliance) |
| Report formats | — | ISO 14644-1, GB/T16292-2010, Federal Standard, British Standard, EU GMP |
| ENVIRONMENTAL SENSOR | ||
| Measured parameters | — | Air velocity, temperature, relative humidity and pressure |
| POWER | ||
| Supply | — | AC 100 – 240 V or Li-ion battery |
| PHYSICAL | ||
| Dimensions W × D × H | inch | 7.9 × 7.9 × 8.1 |
| Weight | kg | 6.44 (14.2 lbs) |
| STANDARDS & SUPPORT | ||
| Standards | — | ISO 21501-4, JIS B9921, CE |
| Warranty | years | 2 |
| Supplied with | — | Quick-start guide, AC adapter, zero filter, isokinetic probe with 2 m (79 inch) tubing, inlet nozzle |
Specifications follow the current manufacturer product data (Kanomax 3900 Series, verified 29 August 2026). Values are summarized for page-level selection. Confirm final model configuration, accessories and calibration certificate before order placement.
Used in these solutions
Applications
ISO 14644-1 / EU GMP Annex 1 certification
ISO Class 5–7 cleanroom certification and EU GMP Annex 1 Grade A/B/C/D classification with 21 CFR Part 11 compliant electronic data trail for FDA-inspected facilities.
Isolator and RABS qualification
High-flow (100 LPM) sampling for RABS and isolator qualification. 21 CFR Part 11 electronic records for FDA Biologics CMC documentation.
ISO 13485 cleanroom periodic classification
ISO 14644-2 periodic classification monitoring and trending for ISO Class 7–8 medical device cleanrooms under ISO 13485.
Accelerated volume sampling
100 LPM (3920) reduces sample time in ISO Class 5 semiconductor fabs — faster classification turnaround during scheduled maintenance windows.
AHU commissioning and filter acceptance
Post-installation HEPA filter acceptance and cleanroom classification after HVAC commissioning. Combined velocity + particle measurement with optional hot-wire probe.
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