Which gauge provides thrust measurements in a jet engine?

The EPR gauge, or Engine Pressure Ratio gauge, is specifically designed to measure the thrust produced by a jet engine. It does this by comparing the pressure of the gases exiting the engine (the exhaust pressure) to the pressure of the incoming air entering the engine (the inlet pressure). By measuring the ratio of these pressures, the EPR gauge gives a clear indication of the engine's performance and the amount of thrust being generated at any given time.

This makes the EPR gauge critical for pilots and engineers in monitoring and optimizing engine performance during various phases of flight. High thrust performance is essential for takeoff and climbing, and understanding the EPR helps in ensuring that engines operate within safe and efficient limits.