A small, independent sensor permanently measures the fence voltage. The energizer display will light with a blue (off), green (all is ok), yellow (alarm in history or other medium priority event) or red (active alarm condition exists) background to announce the energizer’s state at a glance and from a distance. Lanstar Electric Fence Wall-top Security Electric Fence Energizer Lx-2008dcd - Buy Anti Climb High Security Electric Fencesecurity Fence Alarm Systemhome Security Alarm System Product On Alibabacom An alarm will alert you to the loss of voltage in the fence wires due to an interruption in the power supply, or voltage being carried through the wiring, due either to a power outage or a break in the circuit. How does an electric fence alarm work . Alerts are then sent to the energizer controller, or the optional feature of sending a message to your mobile phone via the sms energizer controller and/or an optional alarm system. You may bypass electrified fence but you cannot tota...