Sensor advice, please

Forget about waiting for alerts, 9 times out of 10 they don't work.

oh dear. Perhaps we could offer our help to fix the bulletin board? emailed alerts are a vital part of any community forum.

Buy a $25 or less pump pressure switch that lacks the manual reset, dry source shutoff.

I've not found such a thing in France that has the right (or easily modified) couplings and supports 10bar with a 10A pump motor. But I will keep looking.