The CEC21-1 is a compact, lightweight electromagnetic current meter. The electromagnetic velocity sensor is a time-proven velocity sensor and allows for accurate measurements in different kinds of streams (from weak to strong flows). It adopts Faraday's law of electromagnetic induction to measure the current direction of seawater. CEC21-1 electromagnetic current meter can accurately measure the flow velocity and direction parameters of seawater, river water, sewage and other media in a fixed platform, buoy, and other platforms for a long time. Sensor built-in electronic compass, as well as an acceleration sensor. Accurate measurement of yaw angle,pitch angle, and roll angle, used to calculate, and modify flow parameters