Snap-in replacement for Kestrel 1000, 2000, 2500, 3000, 3500, 4000 Series.
After several hours of sustained operation over 25 M/S (49 KT, 90KM/H, 56 MPH or 4,923 FPM) the Kestrel will lose some accuracy due to wear of the sapphire bearings in the impeller assembly. If you require the highest accuracy AND the best sensitivity for low speed measurements, the manufacturer recommends replacing worn impellers.