The Hall Airspeed Indicator or Wind Meter was designed to fill the need for a simple, rugged, and reliable airspeed indicator, hand-held wind meter, and anemometer.
Since 1976, it has been the standard wind measuring and airspeed measuring instrument for hang gliders, paragliders and ultralight aircraft as well as many other uses such as wind surfing, kite flying, and radio controlled model airplanes.
Although of simple design, the Hall Airspeed Indicator or Wind Meter is very accurate. Each one is individually calibrated for optimal performance.
We wondered ourselves so we sent one to the National Institute of Standards and Technology. (NIST) Our wind meter was tested in a dual section wind tunnel. Side by side comparison with true airspeed on one side and the Hall wind meter on the other side.
Hall Wind Meter True air speed
P=99.2 to 99.8 kpa (744 to 748 mm hg)
T=294.3 to 295.7 K(21.1 to 22.5 C)
Remarkable results for a fully mechanical device. When you use a Hall Wind Meter you can be assured it works, and it is accurate.