[James98]

You need a “smart” pump, meaning a pump with a sensor that will tell it to turn off when the pressure rises above the target range

Just wondering, what would happen if the sensor failed? Is there any safeguard?

That is a very good point. In the pump I am building, if the sensor failed, it would keep pumping. There is a exit function, press the button and the pump would stop and pressure released. I don't see any easy way to make it automatically detect and stop.