Page 5 - DETECTORS, POWER SUPPLY UNITS and accessories

Detektorkatalog rev5 inlaga SE 14-05-21 16.12 Sida 2

GLUED GLASS BREAK DETECTORS

ALARMTECH’s GD 300 series of glued glass break detectors offers reliable GVT 500 is a simpler test unit that can be used with the glass break
and secure detectors for monitoring panes of standard or tempered glass detectors for standard glass, GD 330 and GD 335.
(GD 370 and GD 375 for laminated glass) with high-level immunity to false Installing detectors on glass
alarms. The detectors can be installed in environments with substantial
background noise enabling 24-hour security without complication. They The glass break detectors must be glued directly onto an undamaged glass
solely detect the shattering of glass and are unaffected by background pane to ensure detection of the vibration generated inside the glass when
noise. shattered or broken. The detectable radius depends on the thickness of
the glass – the thicker the glass, the larger the radius. Standard glass of
A piezoelectric crystal sensor identifies the vibration signal generated inside 4 mm thickness has a detectable radius of two metres from the detector.
the glass when shattered. The detector’s electronic analyser is set to high Detectors can be used with a maximum glass thickness of 6.4 mm, which
frequency in order to distinguish external disturbances from actual glass extends the detection range to an approximate four-metre radius. When
breakage. The detector is easy to install and does not require maintenance. mounting on glass surfaces that are covered in protective film, the detector
GD 330 and GD 370 have a built-in relay, which is powered and can be should be mounted directly on the glass pane, not on the protective film.
used directly via a detector loop. Consequently, when installing detectors on windows covered in protective
GD 335 and GD 375 have a transistor output with power disabled in film, a 5–10 cm hole must be cut out the film. Over time, window panes
standby mode. These detectors must be connected to the interface unit IU are exposed to changes in temperature and humidity as well as UV
300 or directly via a detector loop especially suited to this type of detector. radiation. It is therefore very important to use the recommended adhesive
during installation and ensure the gluing process is undertaken according
For laminated glass to instruction to guarantee detection capability.

GD 370 and GD 375 are for use with laminated glass as well as all other The adhesive kit GDK 100 has successfully been used over the past 20
types of glass. years, since production of the detector series first started. The glue has
proved resistant to the environmental impacts of temperature, humidity and
Test Units
UV rays as well as the effects of cleaning products.
GVT 5000 is an advanced glass breakage tester, which replicates the
acoustic signals generated when a glass pane is shattered or broken.