Introduction:As industries face stricter air quality standards, selecting the right laser particle counter supplier  has become critical for facility managers aiming to secure compliance and operational efficiency.   For decades, industrial air quality management focused primarily on preventing outdoor contaminants from entering the facility. However, recent data indicates a shift in focus toward "secondary indoor air pollution"—particles that are re-introduced, generated, or circulated within the facility due to inefficient filtration, equipment wear, or airflow mismanagement. Secondary indoor air pollution is now identified as a major cause of energy waste, equipment overload, and product contamination across multiple high-stakes industries.With stricter Environmental, Social, and Governance (ESG) standards and updated ISO 14644 cleanroom requirements, enterprises are reassessing how filtration systems are monitored. Passive reliance on scheduled filter changes is no longer...