How are wing fuel probes connected to the fuel system?

The connection of wing fuel probes to the fuel system is achieved by generating a DC signal that is proportional to the fuel height in the tank. This method allows the fuel probes to accurately measure the amount of fuel present, which is then transmitted to the aircraft's fuel management system. The accuracy of this measurement is critical for monitoring fuel levels and ensuring safe operation of the aircraft.

Moreover, this DC signal can be digitized for further processing, providing real-time data for the crew. The ability to provide a continuous and proportional signal makes this method reliable for determining fuel quantity, which is essential for flight planning and fuel management during the operational phase of the flight.

Mechanical gauges, while they can provide some level of fuel measurement, do not offer the same precision and may be subject to factors such as fluctuations and inaccuracies that can arise from mechanical parts. Additionally, relying solely on analog systems would limit the capability to integrate with modern avionics and automated fuel management systems, which typically rely on digital signals for enhanced accuracy and functionality.