Accuron 7750 system utilizes single or multiple path acoustic transit-time technology capable of realizing highly accurate flow measurements under the most difficult metering conditions. Sensor pairs, positioned on opposite sides of the flow stream, alternately send and receive flow velocity signals across the entire fluid path. By integrating the average velocities ascertained at each measurement path, and then combining that information with data from the ultrasonic level sensor, flow rates may be precisely calculated to within ±0.5%.