Laser particle counter Met One 3400+

laser light scatteringfor cleanroomslaboratory

Product overview
The transportable Met One 3400+ airborne particle counter is designed for cleanroom monitoring and qualification according to EN ISO 14644 and GMP. It simplifies routine monitoring with an integrated digital assistant that guides compliant measurement execution and minimizes operator errors. Measurement plans can be programmed by area, location and other parameters for repeatable workflows.

Applications

• Biotech & Life Sciences
• Laboratory & Research
• Food Industry
• Mechatronics & Medtech
• Hospital & Pharmacy

Key characteristics

• SOP integration: embed standardized workflows directly for consistent procedures
• Portable use: transportable design for flexible measurements across cleanrooms and zones
• Regulatory support: digital assistant ensures compliant, documented measurements
• Paperless data transfer: secure USB, Ethernet or web export for error‑reduced archiving
• Access control: password-protected operation and Microsoft Active Directory support
• Cleanroom optimized: conforms to EN ISO 14644 and suitable up to ISO Class 5 and better
• Audit trail: tamper-proof recording of all activities for full traceability
• Integrated printer: optional direct printout of measurement reports

Requirements

• Measure particle concentration in air, compressed air, nitrogen or noble gases
• Classify and monitor cleanrooms per EN ISO 14644 or GMP Annex 1
• Inspect HEPA/filtration and exhaust systems in critical installations
• Compare particle counts before and after HEPA filters for filter evaluation

Functional principle
Laser light-scattering sensor counts and sizes particles from 0.3 to 10 µm. Measurement data can be exported via USB stick, Ethernet or web interface; data can also be printed with the integrated printer.

Downloads

• Particle counter flyer (PDF)

Technical specifications

• Commercial denomination: Met One 3400+
• Standards and compliance: EN ISO 14644; ISO class: ISO 5 or higher; 21 CFR Part 11; GMP Annex 1
• Particle size channels (µm): 0.3 / 0.5 / 1.0 / 3.0 / 5.0 / 10.0
• Flow rates by model: 3413+ / 3415+: 28.3 LPM (1.0 CFM) ±5%; 3423+ / 3425+: 50 LPM (1.77 CFM) ±5%; 3445+: 100 LPM (3.53 CFM) ±5%
• Dimensions (W x D x H): 26.7 x 21 x 26 cm
• Weight: typically 6.5 kg (3413/3415/3423/3425); 6.9 kg (3445)
• Measurement media: air, compressed air, nitrogen, noble gases
• Data export: USB stick, Ethernet, web interface; integrated printer
• Security: password-protected access; Microsoft Active Directory integration
• Additional features: portable design; SOP integration; tamper-proof audit trail; documented measurement assistant