Portable Particle Counters 3900 Series — 3905 / 3910 / 3920
Industry-leading portable 6-channel OPCs 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.
Optional hot-wire environmental sensor
The optional add-on hot-wire probe measures air velocity, temperature and relative humidity simultaneously during particle counting — combining cleanroom classification and airflow verification in one instrument pass, reducing total qualification time.
Wi-Fi and Ethernet for real-time data transfer
Wi-Fi and Ethernet connectivity enables real-time data transfer to kanoMaxPC or facility monitoring systems during sampling — eliminating post-run USB data download delays in multi-room certification campaigns.
Technical Specifications
| Parameter | Unit | Value / Description |
|---|---|---|
| MODEL FLOW RATES | ||
| 3905 sample flow | LPM / CFM | 28.3 LPM / 1.0 CFM |
| 3910 sample flow | LPM / CFM | 50 LPM / 1.77 CFM |
| 3920 sample flow | LPM / CFM | 100 LPM / 3.53 CFM |
| OPTICAL SENSOR | ||
| Light source | — | Semiconductor laser diode |
| Min. particle size (3905 / 3910) | µm | 0.3 at 50% counting efficiency |
| Min. particle size (3920) | µm | 0.5 at 50% counting efficiency |
| Channels — 3905 / 3910 | — | 6 simultaneous: 0.3 / 0.5 / 1.0 / 3.0 / 5.0 / 10.0 µm |
| Channels — 3920 | — | 6 simultaneous: 0.5 / 0.7 / 1.0 / 3.0 / 5.0 / 10.0 µm |
| Max. particle concentration | particles/L | 2,000,000 — coincidence loss < 5% |
| USER INTERFACE | ||
| Display | — | 6.4-inch colour touchscreen |
| Built-in printer | — | Thermal printer — on-site paper records |
| Internal memory | records | ≥ 10,000 sample records |
| ENVIRONMENTAL SENSOR (optional) | ||
| Air velocity / T / RH | — | Optional hot-wire probe (velocity, temperature, relative humidity) |
| COMMUNICATION | ||
| Standard interfaces | — | USB; RS-232; Ethernet; Wi-Fi (model-dependent) |
| Software | — | kanoMaxPC data management software (optional) |
| 21 CFR Part 11 option | — | Electronic signature; audit trail; tamper-evident record storage |
| PHYSICAL — 3905 / 3910 | ||
| Dimensions W×H×D | mm | 200 × 205 × 200 |
| Weight | kg | 4.5 |
| PHYSICAL — 3920 | ||
| Dimensions W×H×D | mm | 350 × 210 × 210 |
| Weight | kg | 5.0 |
| POWER | ||
| Battery | — | Rechargeable Li-ion — ≥ 8 h operation |
| AC supply | V / Hz | 100 – 240 V / 50 – 60 Hz |
| CALIBRATION | ||
| Standard | — | NIST-traceable ISO 21501-4 calibration certificate; IQ/OQ documentation available |
Values are summarized for page-level selection. Confirm final model configuration, accessories and calibration certificate before order placement.
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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