HM-CL1 Dust Particle Counter

Product Introduction

The HM-CL1 is the entry-level benchtop dust particle counter from HM Instruments, built for cleanroom and controlled-environment facilities that need six-channel airborne particle measurement without the overhead of battery operation, audit trail modules or onboard printers. A single sampling pass at 2.83 L/min (0.1 cfm) simultaneously measures 0.3, 0.5, 1.0, 3.0, 5.0 and 10.0 µm particle size channels, and the instrument displays both the raw count of each channel and how those counts change between passes.

Confidence-level evaluation follows the Chinese national standard GB/T 6167-2007 and the calibration specification JJF-1190-2008, so the cleanliness class is judged automatically rather than requiring manual lookup. Counts are computed at 95% upper confidence limit (UCL) and can be converted between particles per m³ and per ft³. Built-in temperature, humidity and barometric pressure sensors record the environmental context of every sample. The HM-CL1 suits pharmaceutical plants, drug inspection institutes and hospitals, semiconductor and precision machining workshops, food processing lines, filter manufacturers, and optical, aerospace and bioengineering cleanrooms that need a straightforward, AC-powered counting instrument. For guidance on selecting the right HM-CL series model, see our dust particle counter selection guide.

Applications

• Pharmaceutical industry — pharmaceutical plants, drug inspection institutes and hospitals
• Electronics industry — semiconductor fabs and precision machinery production and machining
• Food hygiene — dairy, plastic-sealed meat, seasoning and agricultural product fine processing
• Filter manufacturers — verifying filter quality and filtration efficiency
• Optical and aerospace fields — fine machining and precision testing cleanrooms
• Bioengineering laboratories and other clean areas requiring particle counting

Functional Performance

1. Six particle size channels measured in one sampling pass, from 0.3 µm up to 10.0 µm.
2. Automatic purification level judgment based on national standard, ISO, 209E and GMP cleanliness classifications.
3. Results calculated at 95% confidence (UCL) and convertible between m³ and ft³.
4. Integrated temperature, humidity and ambient barometric pressure sensors.
5. Light-scattering sensor design that suppresses stray light inside the optical cavity for a higher signal-to-noise ratio.
6. Imported semiconductor laser diode light source rated for more than 30,000 hours of service.
7. Android 7.1 platform with a 7-inch colour touchscreen for direct on-machine operation.
8. WiFi data upload to the supervision platform, plus driver-free USB flash drive copying.
9. Supervision platform client for long-term and short-term cleanliness trend analysis.
10. Single, repeated (up to 99 times) and continuous sampling modes with a sampling period from 1 second to 30,000 seconds.
11. Particle count alarm triggered by user-defined count thresholds.
12. Internal storage for 1 to 100,000 records, searchable and exportable on site.

Main Parameters

Item	Specification
Sampling method	Single, repeated (≤99 times, custom), continuous
Sampling volume	2.83 L/min (0.1 cfm)
Six particle size channels	0.3, 0.5, 1.0, 3.0, 5.0, 10.0 (µm)
Maximum sampling concentration	35,000 particles/L (particle size ≥ 0.5 µm)
Cleanliness standards	National standard, ISO 14644, FS 209E, GMP
Light source	Imported semiconductor laser diode (life over 30,000 hours)
Screen display mode	7-inch colour touchscreen
Host size	185 × 220 × 200 mm (D × W × H)
Bare weight	3.25 kg

Technical Parameters

Item	Specification
Self purification time	≤ 10 min
Particle size distribution error	0.5 µm 5 µm ≤ ±30%
Particle concentration indication error	0.5 µm ≤ ±30%
Measurement repeatability relative deviation	< 10%
Sampling period	1 second – 30,000 seconds (user-set)
Sampling delay	≤ 60 s
Measurement interval	≤ 60 s
Operating environment	15–35 °C, 10–85% RH
Humidity sensor	Built-in, range 0–100% RH
Temperature sensor	Built-in, range covers operating environment
Barometric pressure	Built-in ambient pressure sensor
Data communication	WiFi, standard USB
Data memory capacity	1–100,000 records, searchable and exportable
Operating system	Android 7.1
Alarm function	Particle count alarm via user-set parameters
Outline dimensions	185 × 220 × 200 mm (D × W × H)
Bare weight	3.25 kg
Packing size	460 × 265 × 420 mm
Packing weight	8.6 kg
Reference standards	GB/T 6167-2007, JJF-1190-2008, ISO 14644, FS 209E, GMP (dynamic/static)

Expert Review

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