The CW-PPC300 is a highly portable laser particle counter (93×46×180 mm, 0.95 kg with battery) targeting everyday air quality assessment. It measures particles across three user-defined size bins, supports up to 59 minutes of sampling time, and stores data internally for USB/RS232 download. Designed for ease of use, it features intuitive menu navigation, auto-calibration verification, and low-power consumption for extended field operation — ideal for indoor air quality audits, HVAC maintenance, and educational demonstrations.