Sontek FlowTracker Handheld ADV Designed with the field user in mind, the FlowTracker Handheld-ADV® (Acoustic Doppler Velocimeter) measures 2D currents, attaches easily to wading rods, and features an automatic discharge computation using a variety of international methods, including ISO and USGS standards. Velocity range: ±0.001 to 4.0 m/s (0.003 to 13 ft/s) Velocity accuracy: […]