Abstract: An apparatus, for use with a fluid moving device that moves a fluid from a container. The apparatus includes a flowtube having a passage, the flowtube having a first end and a second end. A body is positioned in the passage of the flowtube, and a sensor array comprising at least two sensors is positioned along the length of the flowtube and between the first end and second end of the flowtube. The sensors in the sensor array sense (e.g., detect) the body as the body flows past the sensors. The sensors in the sensor array are adapted to generate signals, and a controller is operatively coupled to the sensor array. The controller is adapted to control the fluid moving device in response to the signals generated by the sensor array.