Abstract: A system and a method include a container configured to retain one or more liquids. A liquid level sensor is disposed within the container. The liquid level sensor includes a plurality of sensing elements configured to sense a level of the one or more liquids within the container. In at least one example, the sensing elements are optical fibers.

Abstract: A system and a method include a container configured to retain one or more liquids. A liquid level sensor is disposed within the container. The liquid level sensor includes a plurality of sensing elements configured to sense a level of the one or more liquids within the container. In at least one example, the sensing elements are optical fibers.

Abstract: A valve assembly that controls a flow of fluid along a fluid line. The valve assembly includes a valve body sized to fit within the fluid line with the valve configured to rotate within the fluid line between an open position and a closed position. A drive shaft is connected to and extends outward from a first side of the valve body. An actuator is connected to the drive shaft and configured to rotate the valve between the open position and the closed position. A sensor is configured to sense a rotation position of the valve with the sensor positioned at a second side of the valve away from the actuator.

Abstract: A system for power and data communications within a fuel tank and across a wall of the fuel tank includes a fuel height sensor and a sealed connector extending through a wall of a fuel tank. The system also includes an electric power connection between the fuel height sensor and the sealed connector. The system additionally includes an internal data communications connection between the fuel height sensor and the sealed connector, wherein the electric power connection comprises a resistive non-metallic wire.

Abstract: A system for power and data communications within a fuel tank and across a wall of the fuel tank includes an optical hybrid fuel height sensor and a sealed connector extending through a wall of the fuel tank. The system also includes an electric power connection between the optical hybrid fuel height sensor and the sealed connector. The electric power connection includes a resistive non-metallic wire. The system also includes a sealed optical connector extending through the wall of the fuel tank. The system further includes an internal data communications connection between the optical hybrid fuel height sensor and the sealed optical connector. The internal data communications connection includes an optical signal out connection.