Particle Counters

Particle counters are precision instruments used to detect, quantify, and size airborne particles in controlled environments such as cleanrooms, laboratories, pharmaceutical manufacturing facilities, and sterile production areas. These devices ensure compliance with air quality standards by measuring particulate contamination levels, validating environmental controls, and supporting contamination control programs essential for maintaining product quality and regulatory compliance. Particle counters operate by drawing air samples through an optical sensor that uses laser light scattering to detect individual particles. As particles pass through the laser beam, they scatter light proportionally to their size, enabling the counter to classify particles into size ranges (e.g., 0.3 µm, 0.5 µm, 1.0 µm, 5.0 µm). The instrument reports particle concentration in particles per cubic meter or per cubic foot, allowing comparison against ISO 14644 cleanroom classifications (ISO Class 5, 6, 7, etc.) or other regulatory standards. Portable particle counters are handheld or compact devices used for spot-checking air quality, monitoring biosafety cabinets, verifying HEPA filter integrity, and performing routine cleanroom certification. Fixed or remote particle counters are installed in critical environments for continuous monitoring, with real-time data logging, alarm systems, and integration with facility management systems. These systems provide 24/7 surveillance of particle levels, ensuring immediate detection of contamination events. Particle counters are essential in pharmaceutical production, semiconductor manufacturing, biotechnology, medical device assembly, and aerospace industries. They are used for cleanroom qualification (IQ/OQ/PQ), HEPA filter testing, process monitoring, and environmental mapping. Regulatory agencies such as the FDA, EMA, and ISO require documented particle monitoring as part of Good Manufacturing Practice (GMP) compliance. By sourcing pre-owned particle counters from Wasteless Bio, facilities access reliable environmental monitoring technology at reduced costs while supporting sustainable equipment reuse. Each listing includes specifications such as particle size channels, flow rate, detection sensitivity, data logging capabilities, calibration status, and compliance certifications. Particle counters are indispensable for ensuring sterile environments and validating contamination control in regulated industries.