Windscribe from DAVIS INSTRUMENTS
Record breezes as low as 0. 4mph or as high as 150mph (0. 2 meters/sec. ) Uses patented ultrasonic technology to read current wind speed, maximum headwind and tailwind, five-second average and running average. Responds rapidly. No moving parts—nothing to wear out or break. When the wind speed changes, it changes the speed of the sound (the Doppler Effect). A microprocessor keeps track of the changes in value, which are used to give running calculations of wind speed with exceptional accuracy.
$129.00