The OSS-B1 universal current meter is a field-proven instrument for measuring the velocity of water in open and closed channels. It is used for point measurements of flow velocities on the water surface or in vertical profiles down to the riverbed at flow speeds of 0.025 m/s to 10 m/s. The OSS-B1 is made from durable corrosion-resistant stainless steel and it is suitable for use in the most extreme environments. It has been designed for lifetime trouble-free operation under normal use and when properly maintained.