Laser diffraction particle counter Met One HHPC+

for the pharmaceutical industryfor the food industryfor quality control

Overview
The Met One HHPC+ is a handheld particle counter available in 2, 3 or 6-channel configurations. Designed for spot checks and mobile monitoring in cleanrooms and controlled environments down to ISO Class 5. Lightweight (approx. 0.75 kg) and slim for single-hand operation; measures particles in air, compressed air, nitrogen and noble gases.

Applications

• Biotechnology & life sciences laboratories
• Research & laboratory environments
• Food production and processing
• Medtech, medical device production and clean manufacturing
• Hospitals, pharmacies and sterile facilities

Key features

• Compact & mobile — flexible use for in-situ measurements across cleanrooms and production areas
• Easy operation — intuitive interface for rapid measurements without lengthy training
• Fast results — quick particle counts to support real-time process monitoring
• Cleanroom compatibility — suitable for ISO Class 5 environments and higher
• Flexible data export — export results via Ethernet or USB for documentation and analysis

Requirements / Use cases

• Particle load measurements — quantify airborne particles to detect contamination risks and verify compliance
• Rapid particle counting — support quality control and production monitoring with fast, precise counts
• Measurements in confined spaces — compact form factor enables sampling in small enclosures and safety cabinets
• HEPA filter evaluation — measure upstream and downstream particle concentrations to assess filter efficiency

Functional principle
Measurement starts at the touch of a button; results display immediately and can be exported via USB or Ethernet. The lightweight, ergonomic design enables access to hard-to-reach areas for spot checks.

Standards & Certifications

• 21 CFR Part 11 (supported)
• ISO 21501-4
• Suitable for environments ISO Class 5 or higher

Technical specifications

• Model name: Met One HHPC+
• Channel configurations: 2, 3 or 6 channels
• HHPC 2+: Particle sizes (µm): 1.0 / 2.0 / 5.0
• HHPC 3+: Particle sizes (µm): 1.0 / 2.0 / 5.0 or 0.5 / 1.0 / 2.0 / 5.0 / 10.0 (model-dependent)
• HHPC 6+: Particle sizes (µm): 0.5 / 1.0 / 2.0 / 5.0 / 10.0
• Flow rate: 2.83 l/min
• Measuring media: air, compressed air, nitrogen, noble gases
• Outer dimensions (W x D x H): 279 x 10 x 5 mm
• Weight: approx. 0.75 kg
• Data export: USB, Ethernet
• Standards: 21 CFR Part 11, ISO 21501-4
• Cleanroom suitability: ISO Class 5 or higher