Simple and compact, the Kestrel 1000 Handheld Wind Meter fits right in the palm of your hand and weighs a mere 2.29 ounces (65 grams). It's also extremely durable and completely waterproof, allowing you to measure wind speeds even in the harshest weather conditions. The Kestrel 1000 can easily be switched between mph, km/h, ft/min, m/s, knots and Beaufort.
Winds can be measured on any Kestrel up to 135 mph. NK only guarantees the accuracy of the measurement to be within tolerance up to 89 mph. Also at those speeds, it is not recommend any prolonged exposure as it could damage the impeller at those speeds for any prolonged length of time. It is similar to being able to measure very hot temperatures outside of the spec range but do not do it for any extended time.