Perfect for use in fume hoods, environmental studies, or for air flow check. A highly accurate, hand-held unit, only 3 ozs. Allows you to select readout in knots, feet per minute, meters per second, or miles per hour. To ensure maximum sensitivity and accuracy, the turbine is suspended on saphire jewel bearings, and its rotation is sensed by an infrared light beam, which adds no friction. The resulting signal is pro-cessed electrically by an LSI (Large Scale Integrated) circuit.
Powered by 3 "AAA" batteries included.
Measurements: 4½" x 2½" x 1½".