You can use cup type current meter using a cable with sinking weight or wading rod and will accurately measure stream flow velocities from 0.3 to 3.5 meters per second with cups. (Also available in measuring up to 6 meter per second). The cup type current 1 meter manufactured as per IS 3910 – 1966. You can connect this current meter to an automatic counter/water velocity indicator (sold separately). The calibration chart provided with the meter gives the velocity in m/sec.