News » 28.3 L/min

This article explains why online cleanroom monitoring favors 1 CFM (28.3 L/min) and how to plan representative sampling points using a practical Room → Process → Risk method. Larger minute-volume improves detection probability for small particles and shortens response time for transient spikes. We cover engineering essentials—isokinetic probes, optimized tubing, and routine calibration—to keep high-flow data stable. A “good-enough” alarm framework (baselines, SPC limits,...

PMS 31 is a remote, cleanroom-grade particle counter designed for continuous, in-operation monitoring. Delivering a standardized 28.3 L/min (1 CFM) sampling flow, it improves statistical confidence in high-grade areas (ISO 5 / Grade A/B) and detects short-lived contamination events faster. The instrument is calibrated to ISO 21501-4 for traceable, comparable results and integrates easily with EMS/BMS/SCADA systems via RS485 (Modbus RTU). With long-life optics and...