What does a digital pressure gauge primarily convert to a readable format?

A digital pressure gauge primarily converts a mechanical pressure into a readable electrical signal. When pressure is applied to the sensor in the gauge, it uses a transducer to convert the mechanical energy of the pressure into an electrical signal. This electrical signal is then processed and displayed in a digital format, allowing for easy reading of the pressure value.

In the context of the other options, mechanical pressure is what the gauge measures and converts; fluid level and temperature are unrelated measurements that a pressure gauge does not typically address. The focus of a digital pressure gauge is specifically on translating the measurement of pressure into an electrical form that can be easily understood by users through digital readouts.