Editing Security alarm (section)

===Security electric fence===
[[File:Security Electric Fence.JPG|thumb|upright|Multi-zone security electric fence used on top of a physical barrier]]
Security electric fences consist of wires that carry pulses of electric current to provide a non-lethal shock to deter potential intruders. Tampering with the fence also results in an alarm that is logged by the security electric fence energiser, and can also trigger a siren, strobe, and/or notifications to a control room or directly to the owner via email or phone. In practical terms, security electric fences are a type of [[sensor array]] that acts as a (or part of a) physical barrier, a psychological deterrent to potential intruders, and as part of a security alarm system.

Electric fences are less expensive than many other methods, less likely to give false alarms than many other alternative perimeter security methods, and have highest psychological deterrent of all methods, but there is a potential for unintended shock.