KESTREL digital anemometer, model 1000, with electronic rotating blades that can be carried in your pocket.
Measures wind speed: current, maximum and average, in a range of 0.4 to 40 meters per second, from 1 to 144 kilometers per hour, with a resolution of 0.1 and a reading of + -3%. Other units of measure: knots, mph, ft/min and Beaufort force.
It uses high precision jewel bearings and a light weight impeller to provide accurate air flow measurements even at low speeds. The impeller assembly can be replaced by the user if damaged. Liquid crystal display with large 9mm high digits for a clear readout.
Power is from an easily replaceable standard lithium coin cell battery, which will typically give up to 300 hours of operation. The instrument automatically switches off if no keys are pressed for 45 minutes.
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