HM-SCL Handheld Particle Counter for Cleanroom Compliance Testing

Why Particle Counting Compliance Demands a Handheld Solution

In regulated manufacturing environments, cleanroom classification is not a one-time event — it is a recurring obligation driven by ISO 14644, EU GMP Annex 1, FDA 21 CFR Part 11, and China's GMP (2010 revision). Quality managers face a persistent challenge: how to ensure that every sampling session produces data that is accurate, traceable, and immediately available for inspector review. Traditional bench-top particle counters require operators to carry samples to a desk terminal for data retrieval, introducing transcription delays and error risk. Paper-based logs compound the problem by making it nearly impossible to reconstruct who performed a measurement, when, and under which configuration settings.

The HM-SCL Handheld Particle Counter was designed to close this gap. Built around a semiconductor laser source rated for over 35,000 hours, it counts particles simultaneously across six size channels — 0.3, 0.5, 1.0, 3.0, 5.0, and 10 μm — at 2.83 L/min with ±5% flow accuracy. The capacitive touch LCD presents real-time concentration data, cleanliness class ratings, and 95% UCL calculations directly on screen. An integrated audit trail records every user login, configuration change, and sampling action with timestamps, while 4 GB of onboard storage holds up to 100,000 records that remain searchable even during network outages. WiFi and Bluetooth connectivity allow data to flow to LIMS platforms or a portable printer without leaving the cleanroom. The 10,000 mAh battery sustains more than eight hours of continuous operation, covering full-shift sampling campaigns without recharging.

Cleanroom Compliance Applications

• Pharmaceutical GMP verification — Grade A through D area classification with audit trail records that satisfy inspector requests for electronic data integrity evidence.
• Semiconductor fab monitoring — ISO Class 3–7 trend recording where sub-micron particle counts correlate directly with yield loss and wafer defect density.
• Hospital sterile compounding — USP 797 compliance documentation for cleanroom environments where patient safety depends on airborne particle control.
• Food and beverage HACCP — Hygiene zone evidence for dairy, sealed meat, and seasoning production lines, with on-site printed reports supporting batch release.
• Filter and air purifier validation — Upstream and downstream particle counting to verify filtration efficiency during production runs and post-maintenance certification.
• Aerospace precision assembly — Contamination control in environments where a single particle can cause costly rework of high-value components.
• Contract testing laboratories — Method development and client-facing certification reports where printed and stored data must match exactly.

Key Features for Compliance Assurance

1. Semiconductor laser source with >35,000-hour rated life eliminates scheduled lamp replacement downtime and maintains counting stability across long deployment cycles.
2. Six simultaneous particle size channels — 0.3, 0.5, 1.0, 3.0, 5.0, and 10 μm — align with ISO 14644-1 location count requirements and GMP classification thresholds in a single sampling pass.
3. Flow rate of 2.83 L/min (0.1 CFM) held to ±5% accuracy, with maximum counting concentration of 35,000 particles/L, suitable for rooms up to ISO Class 6 depending on volume and location count.
4. Repetitive relative error below 10% ensures that consecutive measurements at the same location produce statistically consistent results, supporting UCL-based classification reports.
5. Capacitive touch LCD with real-time concentration bar charts, equivalent concentration, airflow, and cleanliness class — operators see pass/fail status without exporting data first.
6. Audit trail with multi-user, multi-level permission management logs authentication events, configuration changes, and sampling actions — each entry timestamped and attributed to the logged-in user.
7. 4 GB onboard storage supporting 10,000 to 100,000 records, searchable on the touchscreen by date, user, or event type, remaining accessible during network outages.
8. 95% UCL calculation in particles, particles/m³, or particles/ft³ matches the statistical basis expected in classification reports under GB/T 6167-2007.
9. Dual USB interfaces (flash drive and PC) plus WiFi enable flexible export workflows — from USB walk-away downloads to real-time LIMS integration via wireless network.
10. Bluetooth printer support allows operators to produce signed hardcopy reports before leaving the cleanroom, closing the documentation gap that paper logs create.
11. 10,000 mAh lithium-ion battery delivers over eight hours of continuous sampling, covering full-shift campaigns in facilities with scheduled power maintenance windows.
12. Cleanliness level alarm triggers immediate alerts when particle counts exceed configurable thresholds, enabling rapid response before environmental conditions compromise product quality.

Technical Specifications

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