What is indicated by a fuel temperature indicator?

The fuel temperature indicator specifically measures and displays the temperature of the fuel within the aircraft's fuel system. This information is critical for ensuring that the fuel remains within operational limits to prevent issues such as vapor lock or fuel degradation, which can affect engine performance and reliability. Monitoring fuel temperature helps pilots and maintenance personnel manage the fuel within safe operational parameters, ensuring that the aircraft can operate efficiently and safely throughout its flight. Other indicators, such as fuel flow or pressure gauges, measure different parameters, but the fuel temperature indicator solely focuses on the temperature aspect.