PrintMunro Flow Sensor This versatile flow switch offers a flow / no flow detection in pipe sizes from 1" to 6". Adjustable tension. Specs/Part #s Size Operation Electrical Load Max Amps Flow Temp Working Pressure Model Number 1" NPT NC or NO AC24V-AC250V 15A 0-120˚C 32˚-248˚F 150 PSI ELFLOW1