These meters simultaneously measure and datalog several ventilation parameters using a single probe with multiple sensors. Great for cleanroom filtration airflow measurements — they automatically calculate volumetric flow rate for round, square, and rectangular areas. All models measure velocity, temperature and calculate flow.

Model 10271-27 include additional functionality for measuring humidity and calculating dew poitn and wet bulb. Auto shut-off preserves battery life, and a low battery indicator alerts user of battery condition.