We are offering cup type water current meter. 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 range up to 6 meter per second) the cup type current 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 msec