Bb sensors leakage alarm units water detector 12v or 24v acdc bb sensors leme 12v this leakage alarm unit uses electrolytic conductance measurement from two integrated gold plated electrodes mounted beneath the unit when the electrodes detect liquid a relay output is switched the unit has adjustable feet in order to vary the level at which liquid is detected the unit also features a potential free output and adjustable sensitivity and switching mode suitable for a wide variety of app