Just tested this circuit (using a buffered potentiometer instead of INA180A2).
It works, except for one deficiency I'm not sure how to fix.
What I want: when load current is removed, I'd want the timer to then keep the relay on for a few seconds.
What I get: when load current is removed, the timer will only keep the relay on for whatever time is remaining, since it only looks at the trigger pin whenever the timer runs out. I'd like the timer to only commence once load current is removed.