I automated my liquid chlorine delivery to my pool with a Stenner peristalic pump. I power it with a current sensing switch so that it only runs when the pool pump is running. When the Stenner is adjusted to anything under constant flow it makes a very audible clicking noise. Setting the Stenner on constant flow is not an option as that would over chlorinate my pool. I am looking for a power activated timer that would be run in line with my current sensing switch to power the Stenner for a set amount of time (say 30min) and then cut off. This way I could run the Stenner at 100% (eliminating the clicking noise) and adjust the chlorine dosage by adjusting the timer. The timer would reset to the desired run time (30min) every time the power comes on. Does anyone know of such a timer?