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Model E20 Limpet Set
The model E20 Limpet Set comprises one limpet and one keep, complete with magnet.
F
EATURES
•
Piezo Vibration Detector
•
Thermal Sensor
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Safe Proximity Sensor
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External Magnet Detector
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Supply Detection
This unit meets the essential requirements of the following EU Directives:
EN50131-1:2006 +A1:2009
Security Grade 3
Environmental Class II
These events are signalled by the opening of a pair of normally closed relay contacts.
The device is maintenance free.
A
PPLICATIONS
The limpet sets are designed for the protection of safes, filing cabinets, fruit machines, etc., and
may be fitted to any article or piece of equipment that has a ferrous exterior. The selective
vibration detector is designed to trigger an alarm if any attempt is made to gain access to the
protected equipment by hammering, drilling, chiselling, etc. The heat detector contact opens at
a nominal temperature of 60
°
and gives protection against attacks by thermal cutting
techniques. The keep reed switch, which is held in the closed circuit position by the keep
magnet, becomes open circuit when the limpet is removed from the keep, and thus can trigger
the alarm if any attempt is made to remove the limpet from the keep. In this sense it acts as a
proximity switch. The second reed switch is opened by the presence of an external magnet. This
eliminates the possibility of an external magnet being used to override the keep magnet reed
switch.
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