What device is used to convert pneumatic energy back to electrical energy?

The device that converts pneumatic energy back to electrical energy is indeed a pneumatic generator. This type of generator operates by harnessing the energy from compressed air or gas flow and transforming it into electrical energy through mechanical means, typically involving the use of a rotor or turbine. As the compressed air moves through the generator, it causes the rotor to spin, which in turn generates electrical power.

Pneumatic generators are used in various applications, particularly in systems where a conversion from pneumatic power to electrical power is necessary for operating electronic components or for energy storage solutions. By utilizing the energy stored in compressed air, pneumatic generators offer a way to recover and convert energy in systems where pneumatic actuation is prevalent.

In contrast, the other devices listed serve different functions: a pneumatic power regulator manages the pressure of compressed air, a pneumatic motor converts compressed air into rotational motion instead of generating electrical energy, and a pneumatic sensor detects changes in pressure or flow but does not convert energy types.