Perimeter protection can range from disturbance sensors to electrified fencing, and from beam detectors to fibre technology
Radio-based shock sensors
Viper Space from ADE offers perimeter protection within the installation time of a PIR system, by using radio-based shock sensors on the frames of windows and doors. When activated by a potential intruder, they transmit radio signals to a local receiver unit (LRU) from where you can pinpoint the location of the attempted entry. It provides for a cost-effective installation without wiring to all windows and doors. The only wiring necessary is that needed for a basic PIR-based system.

The LRU contains an integral PIR, so enabling the user to select for shock sensor output/PIR output (or any combination of these). The outputs can be wired to most industry standard control panels that support N/C contact detectors.

Attempted entry can be detected prior to the fabric of the building being breached, giving an early warning and minimising potential loss/damage. Each LRU will detect signals from four individual shock sensors and will regularly monitor for battery condition, communication problems and frequency jamming.

When Bench Tested in our January edition, our experts concluded: "This is an average PIR with an ingenious radio link to (up to) four Viper shock sensors, using established proven technology."
Reader Service No 102

Fibre technology
From Radiodetection, a leading company in the field of cable and pipeline detection, comes a range of fibre optic based detection and location systems aimed at the security of perimeter fences, pipelines and data communications cables.

The "Secure" technology systems, manufactured by Future Fibre Technologies (FFT) in Australia, use standard fibre optic cable as an advanced sensor to detect tiny movements and vibrations caused by intrusion attempts.

Alarms generated, including the event location (within +/- 50m) can be fed into the proprietary CAMS software or third party control software to interface with SCADA or CCTV systems. These robust, reliable systems are maintenance free and designed for continuous use.

Within the range Secure Fence detects intrusion attempts on perimeter security fencing surrounding 'at risk' facilities such as airports, government buildings and military bases. The system can also be deployed in a covert Below Ground System (BGS). The system requires no external sensors, hardware or field power.

Secure Pipe is used to protect pipeline installations and provide early warning against third party interference. Secure Link is ideal for telecommunications applications, where illegal data cable tapping or accidental damage during excavation would be a potential problem.
Reader Service No 103

Perimeter partnerships
Geoquip was due to join forces at IFSEC with its American partner DeTekion and perimeter fence and access control specialist Darfen, along with Cortech Developments, who specialise in software solutions for fire and security systems.

Geoquip's intrusion detection systems include the Defensor, Guard-wire and Impactor microphonic cable sensor systems, RAFID covert volumetric detection system and CentrAlert, the digital alarm processing and management system.

DeTekion Security Systems' products include the VTW-400 electronic taut wire sensor coil 600, which integrates with the Geoquip Alpha sensor and lethal and non-lethal electrified fences.

Darfen specialises in the supply and installation of industrial, commercial, security and sports perimeter solutions, providing total turnkey perimeter packages.

Cortech Developments will show the latest in Datalog security management system software for perimeter, intruder, CCTV, fire, access, radio paging, staff attack and building alarms.

The four companies will demonstrate their own individual security systems and show how each can integrate to provide a total electronic perimeter security solution.
Reader Service No 105

For demanding applications
The TeleGuard EvoX motion detector from Industrie Technik of Germany is said to offer improved tracking detection methods for demanding surveillance work at prisons, military properties and company sites.

It is equipped with all the necessary interfaces and network structures for analogue and digital video technologies, allowing users to choose between applying analogue cross bar technology, digital video over LAN or both at the same time, all with the same video detection system.

TeleGuard EvoX comes in a customary 19-inch industrial design and is built for continuous operation for more than 10 years. It is said to be totally non-wearing, reducing maintenance costs to a minimum regardless of the surveillance system.
Reader Service No 106

Disturbance sensor
Senstar-Stellar Corporation has added a new feature to its Intellifiber fence intrusion detection product line. The optical disturbance sensor four outdoor, fence-mounted security applications now comes in a four-core fibre version with integrated power cabling, known as the 4+2 configuration giving detection, communications and power distribution all on the same cable.

The Intellifiber's sensor cable is jacketed in UV-resistant material, requiring no conduit for installation. It allows length zones of up to 2000m.
Reader Service No 107

Sentry on duty
The Fire and Security Products division of Siemens Building Techno-logies has introduced a sensor designed to alert a site to a potential security breach of the perimeter.

Sentry Flex is a co-axial cable that can be attached to a fence, wall or ceiling. It acts as a linear microphone which constantly monitors for any attempted break-in at the perimeter. An attempt to cut through or climb over the barrier creates a vibration. If the signature of the vibration is above a pre-determined signature in the processor, an alarm condition is activated.

A perimeter of up to 300m can be protected in a single zone configuration with a dual zone processor for runs of up to 600m. Other features include easy recognition of current status, including monitoring for tamper, pre-alarm, fault, pulse count and calibration.
Reader Service No 108

Conventional types
KAC has added two types of conventional beam detector to its World Series product portfolio. The infrared units are manufactured by FFE and provide cost-effective protection of large open areas. They offer a typical coverage of 1500 sq m.

The devices work on different principles. The first unit works on a reflective basis with both transmitter and receiver housed in the same en-closure. The infrared beam is reflected back to the receiver by a prism at the far end of the protected area.

The reflective type includes a built-in controller, while the transmit/receive version has a separate control unit that can be located up to 100m away from the receiver.

There are five selectable sensitivity levels. Once selected, the sensitivity level is maintained during the intervals between routine cleaning and maintenance by automatic gain control.

The units are user-selectable to either latch into alarm or auto-reset.
Reader Service No 109

New generation

A new generation of electrified fences, armed with double the detection capability of conventional systems, has been unveiled by PulseSecure manufacturer Harper Chalice. The powerful new system is equipped with ultra-sensitive tension alarms not just on the impulse wires but on all the wires that make up the fence. This development not only makes it much more difficult for intruders to break through the perimeter undetected, it gives much greater flexibility for site owners – for example, it allows the electric impulse in the fence to be disarmed without compromising security because the enhanced monitoring capability remains active. This is particularly important for sites where the public is given access at certain times. During open hours the PulseSecure fence will not give electric shocks but it will detect any intrusion or tampering attempt. Following extensive trials, all PulseSecure systems will now feature this double-monitoring capability and the company predicts it will become an industry standard. The tension alarms are said to be highly sensitive, robust and not prone to false alarms. The devices are spaced along all the wires at regular intervals and detect all attempts to displace the wires. Because of the way they are spaced – and their high sensitivity – they cannot be bypassed, deceived or neutralised.
Reader Service No 104

Source

Security Installer