The
D21 disturbance sensor from Gallagher is an intelligent intrusion
detection device that senses kinematic behaviour or movement of
structures. The sensor measures the result of kinetic energy
transmitted through a structure when it is disturbed, and signals an
alarm when predefined parameters are exceeded. Read more at -
http://www.sourcesecurity.com/new-products/listing/1/product-profile/intruder-alarms/detectors.2/detectors/gallagher-d21-disturbance-sensor-intruder-detector.html
At
JM Security Systems, we are experts in security and we are able to
provide intruder alarm installation throughout the West Midlands.
Visit us online to find out more.