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Perimitrax is a covert perimeter intrusion detection sensor
that generates an invisible electromagnetic field around buried
sensor cables. When an intruder disturbs the field, an alarm is
declared. In the case of a network system, the alarm is
instantly communicated over the sensor cables to a PC-based
central control system.
- Intelligent 4th generation ported coaxial sensor
- Covert sensor with invisible volumetric detection field
- Terrain-following
- Continuous field of detection with over 99% Probability of
Detection
- Lowest vulnerability to defeat of any outdoor sensor.
1. When should I use Perimitrax?
Perimitrax is a high security sensor that is very difficult to
defeat since the location is hidden and the detection field is
completely invisible. Because of cost, it is most often used in
high security sites where there is a clear zone or sterile zone.
Since the detection field is quite large, the sterile zone should
be at least 5m (16 ft.) wide. Perimitrax is very popular in VIP
estates because it does not affect the beauty of the landscaping
and the sensor is terrain following; in airport applications along
flight lines because it does not stick up and impede aircraft
movement; and in other high security sites where a covert sensor
is desired.
2. Should I use the single sensor cable or the separate transmit
and receive cables?
The cost of the sensor cable is the same in both configurations.
Installation costs can be reduced by about 33% when using the
single cable because only one trench is required. However, the
width of the detection field can be increased to provide more
coverage if two separate sensor cables are used and buried 2m (6.6
ft.) apart
3. How deep is the cable buried?
The cable is buried 22cm (9 in.) in soil and 6cm (2.5 in.) in
asphalt and concrete.
4. Can I repair the cable?
A cable can be spliced up to six times in a zone without affecting
performance
5. Can I use other sensors with Perimitrax?
Perimitrax can be used in conjunction with other outdoor sensors,
e.g. Intelli-Wave or Intelli-Field, to provide detection fields
containing maximum width and height.
6. Will small animals such as dogs and cats cause nuisance alarms
on Perimitrax?
Perimitrax is designed to always detect people with a mass of 34kg
(75lbs) or greater while always rejecting animals with a mass of
10kg (22lbs) or less. The sensitivity can be adjusted up or down
depending on the threat. Most animals can be adjusted out of the
detection range while still maintaining perfect detection for
people.
7. Does lightning affect the performance of the system?
All connections to the electronics are protected with transorbs
and gas discharge lightning suppression. Since the sensor cables
are buried underground, much of the electrical discharge from a
nearby lightning strike dissipates before reaching the sensor
cables. A second optional gas discharge lightning suppressor can
be installed on the sensor cables outside the electronic housing
to increase the protection in areas of extremely high lightning
activity.
8. Can I upgrade my Sentrax system to Perimitrax?
Older Sentrax systems can be upgraded in two ways. The newly
designed sensor cable for Perimitrax can be used with the
oPerimitrax Buried Cable Intrusion Detection Sensorlder Sentrax
electronics with a few constraints. The 'N' connections used on
the previous Sentrax TMs must use adapters to connect to the 'TNC'
size Perimitrax cable. The distribution of power over the
Perimitrax cable is not as efficient as the older and larger
diameter Sentrax cable. Otherwise, the new cable works with the
Sentrax TMs. Please contact Senstar-Stellar Corp. Customer Service
for advice on your system. The Perimitrax Sensor Modules are not
backward compatible with Sentrax TMs. They will, however, work
with the Sentrax cable using adapters to change the connector
size. For upgrade purposes, the Sentrax cable can be kept and the
Sentrax electronics changed to Perimitrax Sensor Modules, if all
the TMs are changed to Perimitrax at the same time.
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