1 General information
The Vanderbilt GM7xx range of seismic detectors has been the market leader in seismic detection for
more than 20 years. Vanderbilt detectors are designed to detect and report any attempt to compro-
mise the integrity of any type of high value storage unit.
Vanderbilt’s patented detection technology covers a wide spectrum of attack types. The flexibility in
the design and local environmental compensation enables normal activities to continue without creat-
ing unwanted alarms.
The GM7xx range of detectors are capable of detecting attacks using many different methods:
Tamper protection
Temperature surveillance (for thermal attacks)
Shock detection (impacts on the detector or monitored surface)
Access times (automatic or manual access without creating an alarm, controlled via the
intruder panel)
Integration alarms (low level frequencies detected over a longer period of time).
The critical component of all GM7xx seismic detectors is a patented bimorph sensor that provides un-
rivalled detection, unwanted alarm immunity and reliability. GM7xx detectors are compatible with most
intruder systems but peak performance is achieved when the detectors are connected to the Vander-
bilt SPC panel. See Section 9 Interface to SPC Panel/System for more information.
Detection of an attack is primarily achieved by monitoring the surfaces of the protective enclosure and
detecting any vibrations that are carried through the structure. Vibration signals are evaluated based
on amplitude (signal strength), frequency, and duration to differentiate between an attack and general
background signals. This patented technology enables swift and reliable detection of any attempt to
gain unauthorised entry to the protected space. With several different detector options, an unrivalled
range of accessories, and an extensive range of programming options, the Vanderbilt GM7xx range of
seismic detectors offers reliable detection and the highest immunity to unwanted alarms.
Figure 1-1: GM7xx Seismic detectors – Attack types
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