Kestrel 1000

The Kestrel 1000 Pocket Wind Meter provides all of the reliable, accurate wind measurements that you need. The large impeller turns in the faintest of breezes and is easily replaced.
This portable anemometer allows you to quickly change between knots, meters per second, kilometers per hour, miles per hour, feet per minute, and Beaufort. And the hard cover lets you throw the Kestrel 1000 in your pack without damage.
Features:
Current Wind Speed
Average Wind Speed
Maximum Wind Gust
One-button clear and restart of Max Wind Gust and Average
Wind measurement
Waterproof & Floats
Hold Function
User-replaceable Impeller
Slip-On Protective Cover
Neck Lanyard
Five-year warranty from the manufacturer
Specifications:
Wind Speed (sample every 1 second)
0.4 to 60 m/s (0.1 resolution, 3% accuracy)
59 to 11,948 ft/min (1 resolution, 3% accuracy)
1 to 218 km/h (0.1 resolution, 3% accuracy)
0.8 to 135 mph (1 resolution, 3% accuracy)
0.6 to 118.3 kt (0.1 resolution, 3% accuracy)
0 to 12 Beaufort (0.1 resolution, 3% accuracy)
Power requirements: 1 CR2032 Coin Cell (included)
Battery life: ±300 hours, depending on backlight use
Dimensions:
Unit: 4.8" x 1.7" x 0.7" (122mm x 42mm x 18mm)
Case: 4.8" x 1.9" x 1.1" (122mm x 48mm x 28mm)