Senstar Corporation LM100 User Manual
Fence structures
Page 14
Senstar LM100 Product Guide
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Probability of detection (Pd) vs. nuisance alarm rate (NAR) - With a fence-mounted intrusion
detection system there is always a trade-off between the probability of detection and the
nuisance alarm rate. A properly calibrated system will provide a high Pd while minimizing the
NAR.
detection system there is always a trade-off between the probability of detection and the
nuisance alarm rate. A properly calibrated system will provide a high Pd while minimizing the
NAR.
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Alarm assessment/response - What happens when the system triggers an alarm? Can the
alarm be assessed visually? Does the site include CCTV coverage to verify the event?
Senstar recommends engaging a security consultant to discuss the available methods of
alarm assessment. To ensure maximum confidence in the system you must be able to
distinguish between valid alarms and nuisance alarms.
alarm be assessed visually? Does the site include CCTV coverage to verify the event?
Senstar recommends engaging a security consultant to discuss the available methods of
alarm assessment. To ensure maximum confidence in the system you must be able to
distinguish between valid alarms and nuisance alarms.
•
Deterrence - The Senstar LM100 can activate or strobe lights at the location where an
intrusion attempt is detected, while the intruder is still outside the perimeter fence. Brightly
illuminating the area of attack serves as a powerful deterrent while also providing high quality
light for CCTV coverage.
intrusion attempt is detected, while the intruder is still outside the perimeter fence. Brightly
illuminating the area of attack serves as a powerful deterrent while also providing high quality
light for CCTV coverage.
Fence structures
To ensure consistent detection, the fence panels should be similar in type and size and be in good
condition. Ensure that there are no loose panels, fittings or metal parts that can move and cause
nuisance alarms. A shake test in which you grip the fence fabric in the middle of a panel and shake
it back and forth with an increasing motion will help identify any loose pieces. Listen for metal-on-
metal contact and correct any problems found. Verify that there are no washouts or depressions
under the fence that could allow an intruder access. Ensure that there is no vegetation or other
objects that can make contact with the fence in windy conditions.
condition. Ensure that there are no loose panels, fittings or metal parts that can move and cause
nuisance alarms. A shake test in which you grip the fence fabric in the middle of a panel and shake
it back and forth with an increasing motion will help identify any loose pieces. Listen for metal-on-
metal contact and correct any problems found. Verify that there are no washouts or depressions
under the fence that could allow an intruder access. Ensure that there is no vegetation or other
objects that can make contact with the fence in windy conditions.
Stainless steel post clamps are included for mounting the gateway and the luminaires. The post
clamps fit a wide range of post sizes with outside diameters (ODs) from 4.5 to 13 cm (1¾ to 5 in.).
The clamps will fit rectangular posts measuring up to 10 cm (4 in.) per side. The recommended
luminaire spacing is from 3 to 6 m (10 to 20 ft.) separation. However, The maximum recommended
separation between two luminaires is 20 m (66 ft.) to ensure accurate low power RF
communication between the devices.
clamps fit a wide range of post sizes with outside diameters (ODs) from 4.5 to 13 cm (1¾ to 5 in.).
The clamps will fit rectangular posts measuring up to 10 cm (4 in.) per side. The recommended
luminaire spacing is from 3 to 6 m (10 to 20 ft.) separation. However, The maximum recommended
separation between two luminaires is 20 m (66 ft.) to ensure accurate low power RF
communication between the devices.
Standard flexible fence types
Chain-link fence
Chain-link fence is usually comprised of steel wires that are bent lengthwise into zig-zag patterns.
The zig-zag wires are vertically woven to form the characteristic diamond pattern. The fence fabric
is attached to fence posts approximately 3 m (10 ft.) apart. Tension wires are often used to stiffen
the fence fabric at the top, bottom and middle of the fence. Chain-link fences are available in
different heights and are sometimes vinyl coated.
The zig-zag wires are vertically woven to form the characteristic diamond pattern. The fence fabric
is attached to fence posts approximately 3 m (10 ft.) apart. Tension wires are often used to stiffen
the fence fabric at the top, bottom and middle of the fence. Chain-link fences are available in
different heights and are sometimes vinyl coated.
Welded-mesh fences
A typical welded-mesh fence section consists of steel wire welded into a grid, with horizontal
spacing differing from vertical spacing. These fence sections are secured to fence posts and often
include top and bottom rails.
spacing differing from vertical spacing. These fence sections are secured to fence posts and often
include top and bottom rails.
Note
It is also possible to install luminaires by marking the fence posts,
drilling four holes and using self-tapping screws.
drilling four holes and using self-tapping screws.