HM-CL3 High-Flow Particle Counter for Large-Volume Cleanroom Classification

Product Introduction

ISO 14644-1 specifies a minimum sample volume per location that depends on the cleanliness class — the cleaner the room, the more air must be sampled. In an ISO Class 5 room, a location may require 1,000 litres. At 2.83 L/min, that takes nearly six minutes; at 28.3 L/min (1 cfm), about 35 seconds. A twenty-point campaign drops from two hours to under fifteen minutes.

The measurement core is the same six-channel light-scattering engine used across the HM-CL series, counting 0.3, 0.5, 1.0, 3.0, 5.0 and 10.0 µm particles in a single pass. Confidence-level evaluation follows GB/T 6167-2007 and JJF-1190-2008, results are computed at 95% UCL, and the instrument assigns the cleanliness class automatically against national standard, ISO 14644, FS 209E or GMP criteria — in both dynamic and static states. Counts convert between per m³ and per ft³, so the same report serves an ISO-classified room and a customer specification written in FS 209E terms.

The HM-CL3 includes the HM-CL2's full compliance suite: FDA 21CFR PART11 audit trail, AC/DC battery (74 Wh), thermal printer, WiFi upload and 1–100,000 record storage. What it adds is the external high-flow filter for self-purification between locations without relying on the room's filtered air. For facilities with mixed room sizes, see the HM-CL3 model comparison.

Applications

• Large pharmaceutical cleanrooms — Grade A/B certification with many locations and high minimum-volume requirements.
• Semiconductor fabrication halls — ISO Class 3–5 ballroom cleanrooms where sub-micron counts drive yield models.
• Aerospace and precision optics — large-volume test chambers where high-flow certification and audit trail are required.
• Filter manufacturer qualification bays — upstream/downstream counting where high flow reduces time per scan point.
• Food hygiene processing — HACCP certification with on-site printed reports for batch release.
• Contract testing and research laboratories — customer-facing certification reports where printed results must match the stored log.

Key Features & Advantages

1. 28.3 L/min (1 cfm) sampling volume — collects the ISO 14644-1 minimum sample volume per location in a single pass, ten times faster than 2.83 L/min models.
2. External high-flow filter for instrument self-purification between sampling locations, independent of the room's own filtered air supply.
3. FDA 21CFR PART11-compliant audit trail: queryable, traceable and controllable — every sampling run, configuration change and user login is logged automatically.
4. Six particle size channels measured simultaneously in one sampling pass: 0.3, 0.5, 1.0, 3.0, 5.0 and 10.0 µm — covering the full ISO 14644-1 size range.
5. Automatic cleanliness class judgment against national standard, ISO 14644, FS 209E and GMP criteria in both dynamic and static states.
6. 95% upper confidence limit (UCL) calculation applied by the instrument, matching the statistical basis expected in classification reports.
7. AC/DC dual-use power with built-in rechargeable lithium battery (74 Wh, 16.8 V/5 Ah) supporting more than 6 hours of continuous high-flow sampling.
8. Built-in thermal printer — operator selects which particle size channels to print and receives the report before leaving the room.
9. Integrated temperature, humidity and ambient barometric pressure sensors recorded in the same data row as the particle counts.
10. Light-scattering sensor design that suppresses stray light inside the optical cavity for a higher signal-to-noise ratio at the 0.3 µm threshold.
11. Imported semiconductor laser diode rated beyond 30,000 hours supports long-term certification duty without frequent light-source service.
12. Android 7.1 platform with a 7-inch colour touchscreen for direct on-machine configuration, data review and audit log search.

Technical Specifications

FAQ

Expert Review