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Taut Wire Perimeter Intrusion Detection System

DTR 90 / 2000
Revolutionizing Perimeter Protection

The DTR line of taut wire perimeter intrusion detection systems revolutionized the ENTIRE perimeter protection field by combining a true physical barrier with highly reliable intrusion detection in one cost-effective package.

Over the years, the DTR-TWIDS (Taut Wire Intrusion Detection System) systems have established a solid reputation for successfully preventing perimeter intrusion with a minimum of false alarms. The DTR systems are today in use worldwide, in hilly terrain, jungles, deserts, seashore sites, etc. protecting some of the most security sensitive installations and borders on the globe.

 The DTR-90 model is a time proven version suitable for medium and high security applications. The DTR-2000 model is a recently enhanced version utilizing two taut wires per sensor sensititivy. The DTR-2000 is intended for those clients having very high security applications.

The DTR Series systems can be erected as stand-alone fencing, attached to conventional chain-link fencing, or mounted on existing walls, gates, roofing, etc. No power supply is required in the field. At the heart of the systems are our patented, self-adjusted sensor switches. These sensors are clamped at the mid-point of horizontal barbed wires which have been stretched and pre-tensioned between two rigid anchor posts.

The sensor switches are mounted within a tamper-proof enclosure with tamper and anti-clamping alarm features. Deflection of a wire, as a result of an intruder climbing over or through the fence or the release of tension by cutting of a wire, causes actuation of the lever arm of the sensor, which results in closure of the switch contact. The alarm contacts are monitored by any central processor unit or hard-wired control unit.

Very Low False Alarm Rate

The latest generation DTR-90/2000 incorporates a very reliable, computerized, on-line intrusion alarm system with an extremely low false alarm rate (FAR) of less than 1 false alarm per 3 months, per kilometer, even in harsh climatic conditions.

Deflection of a DTR-90/2000 fence wire by spreading, climbing over or through the fence or release of wire tension by cutting, causes an immediate visual and audio alarm signal at the system's central control.

The intrusion alarm system remains unaffected by forces of up to 25 kg. (50 lbs.), preventing false alarms caused by such small animals as rabbits, birds, cats and dogs.

DTR 90 & DTR 2000 System Components

The major components are as follows:

Field-mounted Equipment

• sensor posts
• anchor posts
• slider posts
• information cable
• movement transfer wire (barbed wire)
• tensioning and clamping accessories

The DTR-3000 is available in 2 control configurations: 

Configuration I	Interference
Configuration II	Computerized Control Center--CCC (IBM or compatible PC based)

See leaflet on Advanced Computerized Control for more information.

DTR 90 & DTR 2000 Features and General Specifications 

alarm system	combined alarm system and physical barrier
fence height	adaptable to existing fence or custom specified
resolution	adjustable intrusion location resolution
sensitivity	patented self-adjusting sensor mechanism
false alarm rate (FAR)	field proven less than 3 per month per 1 km
temperature range	-40° to +72°C (-32°F +160°F)
relative humidity	up to 95%
rain, dust, ultraviolet radiation	unaffected along with corrosive atmosphere (90 model-galvanized iron, 2000 model-aluminum)
tested and approved	by the Israel Defense Force and major foreign customers (over 1000 km installed worldwide)

System Specification 

terrain	ideally suited for long perimeters and perfectly suited for difficult terrain
installation	can be installed alone on any existing fence or on existing wall
fence height	adjustable to customer specifications
sensitivity	system divided into sections to facilitate ease of location of intruder

System Components 

sensor post	patented self-adjusting sensor - variable positioning of sensor in post permitting variable distance between barbed wires - corrision resistance materials - antitampering alarm to stop dismantling post
anchor post	Breakaway strips for tying barbed wire ensures that climbing on post impossible.
sliderpost	Maintains minimum friction, supports barbed wires and ensures vertical forces, converted to horizontal movement.

Reliability 

MTBF sensor	4.6 x 106 hours
MTTR	30 minutes

Physical Description 

fence length	no practical limitation
fence height	according to customer specifications
standard configuration	8 ft. vertical + 40" inclined outrigger, 24 + 10 wires
sensitivity	fixed and independent of climatic conditions
deflection force	25 kg. (50 lbs.) and more force will activate alarm
false alarm rate (FAR)	1 per 1 km per 3 months maximum

Environment
All external units are designed to meet MIL-STD-810 C. No degradation in performance when exposed to or operated in the following environmental conditions: 

temperature range	-32° to +72°C (-26°F +160°F)
relative humidity	up to 95%
rain, hail, snow, dust, UV radiation	unaffected
corrosive atmosphere	stainless steel option designed for high corrosion environment
lighting & electronic transients	meets MIL-STD-9094

Specifications subject to change without prior notice

For more information please feel free to contact us , or fill out our literature request form.