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Products - Senstar Stellar
OUTDOOR SECURITY SOLUTION / PERIMETER SECURITY
Outdoor security sensors detect intruders as soon as they enter a protected area and before they can gain access to people or valuable assets. An outdoor security system can demonstrate a return on investment by reducing the risk of theft, damage or personal injury. As well, in a correctional environment, outdoor security sensors can be used to immediately detect prison escape attempts. In many institutions this has resulted in eliminating escapes via the perimeter, reducing staff and eliminating the need to construct watchtowers at new facilities.
Several types of outdoor sensors exist in the market. The decision of which sensor to use
depends on several factors: -
perceived threat and level of protection required
- effectiveness of the sensor against the threat [probability of detection, false/nuisance alarm rate (FAR/NAR) and vulnerability to defeat]
1.Buried cable sensors
Buried cable sensors are covert, which makes them very difficult to defeat.
Seismic
There are several sensor types which can be classified as seismic. These include: geophones, capacitance, fluid filled balanced pressure tubes, piezo and fiber optic.
Magnetic
Magnetic sensors have the capability of detecting objects with ferro-magnetic properties. These sensors are prone to nuisance alarms from lightning and electric fields.
Ported (leaky) coaxial electromagnetic cable
Buried ported (leaky) coaxial cable sensors generate an electromagnetic field both above and below the ground which detects intruders moving through the field. They are immune to most environmental conditions such as snow, fog, rain, wind and vibration.
2. Portable sensors
Portable sensors are usually battery powered and can be rapidly deployed. A wide spectrum of technologies has been incorporated into portable sensors.
3.Video motion detection
Video motion detection sensors (VMD) provide both detection and visual assessment capabilities.
4.Line-of-sight/beam sensors
Line-of-sight sensors are above-ground intrusion detection sensors that are limited to installations on flat terrain without any obstructions. These sensors include microwave, active and passive infrared and photoelectric beam sensors.
5.Barrier sensors
Barrier sensors are above-ground detection sensors which are either attached to an existing fence or wall, or create a barrier themselves.
Fence Motion Sensors
Fence motion sensors must be mounted in or on existing fences. Microphonic cables sense the vibrations being carried in the fence material. In the case of fiber optics, a fiber optic cable guides light waves from a light source at one end, to a detector at the other end of the cable.
Electric Field Sensors
Electric field sensors employ an electrostatic field, created between two sets (typically) of parallel wires. An intruder attempting to pass through the wires disturbs this field.
6. Combined Barrier and Sensor
Taut wire systems are a combined barrier and sensor. A set of parallel, tensioned wires creates the barrier. Sensors connected to the wires detect an intruder’s attempts to cut, climb or spread the wires in order to penetrate the perimeter.
7.Infrared (IR) illuminators
IR illuminators create light that is not visible to the human eye, but that illuminates targets for surveillance or assessment by infrared-sensitive closed circuit television (CCTV) cameras.
8. Alarm annunciation, control and communication
Alarm annunciation, control and communication systems integrate all outdoor and indoor sensors and CCTV camera systems. These systems annunciate an alarm, display the alarm (often on a site map), and communicate the alarm data to a control center.
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14000EDS
