Abstract: A fuel gaging system, such as may be used in determining an amount of fuel in an aircraft fuel system, includes a capacitance probe and a capacitance measurement circuit component including high resistance elements. The capacitance measurement circuit component includes a first excitation generator, an excitation wire connected between the first excitation generator and the capacitance probe, and a signal wire connected to the capacitance probe with the capacitance probe being connected between the excitation wire and the signal wire, wherein the first excitation generator generates an input signal applied to the excitation wire and an output signal is read from the signal wire to determine a capacitance at the capacitance probe.

Abstract: A fuel gaging system, such as may be used in determining an amount of fuel in an aircraft fuel system, includes a capacitance probe and a capacitance measurement circuit component including high resistance elements. The capacitance measurement circuit component includes a first excitation generator, an excitation wire connected between the first excitation generator and the capacitance probe, and a signal wire connected to the capacitance probe with the capacitance probe being connected between the excitation wire and the signal wire, wherein the first excitation generator generates an input signal applied to the excitation wire and an output signal is read from the signal wire to determine a capacitance at the capacitance probe.

Abstract: An aircraft measurement system includes an interrogator and an optical sensor assembly. The optical sensor assembly includes an optical sensor connected along a sensor path to the interrogator, a data storage device, and a control circuit connected along a power path to the interrogator. The sensor assembly also includes an opto-electric device for converting an optical signal to an electric current, connected along the power path between the interrogator and the control circuit, to power the data storage component through the control circuit, and a transmitter operationally connected to the control circuit and connected along a data path to the interrogator, to provide operational data along the data path to the interrogator. The data storage component provides operational data to the interrogator across the data path, and the interrogator is configured to receive sensor data from the sensor across the sensor path.

Abstract: A measurement system for an aircraft includes an interrogator and an optical sensor assembly, remotely connected to the interrogator. The optical sensor assembly includes an optical sensor connected along a sensor path to the interrogator, a data storage device configured to store operational data, and a control circuit operationally connected to the data storage component, and connected along a power path to the interrogator. The sensor assembly also includes an opto-electric device for converting an optical signal to an electric current, connected along the power path between the interrogator and the control circuit, to power the data storage component through the control circuit, and a transmitter operationally connected to the control circuit and connected along a data path to the interrogator, to provide operational data along the data path to the interrogator.