MET ONE HHPC+ Handheld Air Particle Series

MET ONE HHPC+ Series handheld particle counters allow easy ISO Class 5 to 7 monitoring in hard-to-reach places. Lightweight with a high-resolution display, these handheld counters are ideal for routine monitoring of controlled environments and mini-environments, easy filter leak troubleshooting for particle-contamination issues, spot-checking critical areas, and targeting particle generation within process equipment.

  • ISO 14644-1 industry standard
  • CFR 21 Part 11 compliance enabled
  • 0.3 μm - 10.0 μm particle detection
  • 2-6 channel detection
  • Single-hand operation
  • PC access to particle counting data via Ethernet, USB, or cable for data transfer options

Explore MET ONE HHPC Series Models

MET ONE Hand Held Air Particle Counter (HHPC) Features


  • ISO 14644-1 Class 5 (FED STD Class 100 or higher) compliant sampling
  • Counting efficiency to ISO 21501-4
  • Zero count level to JIS B9921

Data Management

  • On-the-spot process profiling for fast particle event tracking
  • Easy network connectivity for 21 CFR Part 11 compliance
  • Store up to 10,000 records
  • Convenient charge cradle for access to particle counting data via Ethernet or USB cable
  • Data download via Ethernet
  • Connectivity through USB and memory card

Ergonomic Design

  • Easy-to-read high resolution display
  • Fully configurable display
  • Slim & lightweight design (0.7 kg) for single-hand use


  • Routine monitoring in high-tech manufacturing & GMP-regulated cleanrooms
  • Particle contamination troubleshooting in critical processing areas
  • Spot checking & troubleshooting in mini-environments & workstations

Product Specifications

Performance ISO 14644-1 class 5 compliant 0.3 µm samples in a minute
Industry Standards 21 CFR Part 11, ISO 14644-1:2015, CE, FCC
Coincidence Loss 10% at 4,000,000 particles/ft³
Sample Volume 10 µm
Throughput 2.83 L per minute
Zero Count Conforms to JIS B9921 (1 count or less in 5 min; 95% UCL)
Counting Efficiency 50% at 0.3 µm (100% for particles > 0.45 µm)
Count Alarms Display and Cycles User-defined alarm counts, Raw counts: N/CF, N/CM, N/L in cumulative or differential mode
Item Specifications Referenced 2089310-06

Capturing a Sample


Content and Resources

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Certified Calibration Services for MET ONE Calibration services flyer about audit-quality calibrations for your MET ONE air particle counter
MET ONE HHPC+ Series Handheld Particle Counters Product brochure about the handheld air particle counters that have a fully configurable, easy-to-read high resolution display presenting only the data you want in a clear large font

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