A stress inducing device for inducing stress into a fiber optic cable is
useful for detecting a person attempting to breach a security fence by
climbing over the security fence. A stress inducing device is attached
adjacent to a top of each fence post of the security fence. A fiber optic
cable runs adjacent to a top of the security fence, and passes through
each of the stress inducing devices. Once activated, a pressing member of
the stress inducing device will pinch the fiber optic cable therein
causing an alarm. The stress inducing device will be activated if a
person leans a ladder against the fiber optic cable or the stress
inducing device itself, or if a person attempts to open or tamper with
the stress inducing device.