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High efficiency: >99% collection efficiency for PM2
Long battery life: Up to 8 hours on a single charge
Constant flow 20 – 5
weather-resistant sensors deliver accurate and consistent performance
Field calibration to verify pump performance
Calibrators Defender Air Sampling Pumps High efficiency: >99% collection efficiencyDefender Flow Meter by Mesa Labs The Defender by Mesa Labs is a primary flow meter that measures volumetric gas flow and can be used to calibrate other flow devices. It is a lightweight, portable flow meter that is easy to use and provides accurate readings. The Defender is available in three models: the 510, 520, and 530+. The 510 measures volumetric flow, the 520 measures volumetric flow and displays gas temperature and pressure, and the 530+
