Slimfarmer, take a look here for inspiration: Hydraulic valve info from Telegram group - #5 by TERVUREN
In this setup the hydraulic pressure contact is a on off type.
To replicate that situation with your transducer I would build something with the transducer connected to a potentiometer(and maybe a resistor or two) and let that combi activate a relay with a optical 5V input (arduino module type) If you have a double module, one of them could be for this auto off function, and the other for the shut off valve.
With the potentiometer you could adjust how high pressure must be before activating relay.