Which device measures fuel quantity via capacitance?

• A. The signal data computer processes readings from capacitance gauging transmitters.
• B. A float gauge in each tank.
• C. An infrared scanner.
• D. An optical sensor.

Answer: (A)

Measuring fuel quantity through capacitance relies on sensors designed to detect changes in capacitance as the fuel level varies. Those sensors are the capacitance gauging transmitters. The signals they generate are then sent to and interpreted by the signal data computer, which converts the raw readings into actual fuel quantities. So this option best fits the process: capacitance gauging transmitters perform the measurement, and the signal data computer processes their readings to yield a quantity. The other approaches don’t measure via capacitance—float gauges rely on a floating mechanism, while infrared or optical sensors use different principles and aren’t the capacitance-based method used here.