The threat · Razor wire alone not stopping them?

D-Concertina

Name: D-Concertina
Brand: D-FENCE

Standard razor-wire concertina turned into a detection line: strain-gauge sensors report the exact zone of a cut or climb.

Patent pending

15 kg deflection alarmZones up to 100 mRetrofit or new line

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For integrators & consultants

L3LayerThe perimeter line

DatasheetPDF · 309 KB Tender specification textCopy text

Razor-wire concertina on sensor arms and taut-wire outriggers along the crown of a block perimeter wall

Razor wire that tells you where it was breached.

D-Concertina turns a standard razor-wire concertina of any diameter, in an open design, into an electronic intrusion detection system. The coil stays a barrier that is very hard to penetrate; D-FENCE strain-gauge sensors add the pinpoint location of every attempt.

Barrier and sensor in one

The coil still stops and delays the intruder; the sensors add an exact alarm zone.

Any coil, new or existing

Retrofit two sensing wires inside the concertina you have, or install a complete new line.

Built for exposed sites

Anti-corrosion treatment to MIL T 152, −25 °C to +72 °C, 10-year sensor warranty.

Two options: retrofit an existing fence by stretching two sensing wires inside the coil and connecting them to sensors on sensor posts, or supply and install a complete new concertina line together with the electronic system.

Alarms are managed locally, remotely or from a central control centre. Typical sites: prisons, airports, ports, refineries, army bases and critical infrastructure.

From the first touch to the right response.

Coil on sensor posts
Razor-wire concertina of any diameter mounts on arms or posts with strain-gauge sensors.
Sensing wires
Two wires run inside the coil and connect to the sensors.
Detection
A cut, climb or push of 15 kg and above changes the tension and raises the alarm.
Control centre
The alarm and its exact zone reach a local, remote or central control centre.

Seen in full.

Every image opens full size. Product sheets are shown whole, exactly as D-FENCE publishes them.

Render: double chain-link fence with concertina coils in front of a refinery, inset of the concertina sensor — **FIG. 01**Refinery perimeter

An intruder climbs a wall crown protected by concertina; the attacked zone is highlighted and an alarm is raised — **FIG. 02**The climb is reported, with its zone

Concertina on green sensor arms along a block wall around an electrical installation — **FIG. 03**Energy site perimeter

Render: snowy airport fence with concertina coils and taut wire, insets of the concertina sensor and the taut-wire post — **FIG. 04**Layered with D-Taut Wire

Render: concertina coils and welded mesh on green sensor posts across a desert perimeter — **FIG. 05**Desert border line

Looking through concertina coils on a snowy slope toward the fence line — **FIG. 06**Field installation in winter

Render: airport chain-link fence topped with concertina, camera pole and control box; inset of the electronic concertina sensor — **FIG. 07**Airside fence line

Concertina on sensor posts along the top of a clad wall around a logistics warehouse — **FIG. 08**Logistics and industrial sites

Render: concertina on sensor-post arms along the top and the foot of a brick wall — **FIG. 09**On an existing wall, top and base

Concertina coil clamped to a D-FENCE triangular sensor bracket on a green post, white background — **FIG. 10**The concertina sensor

See it work.

D-Concertina · 0:30

D-Concertina: three types

Factory footage of razor-wire coils fitted with D-FENCE sensor clips, offered in three concertina types.

Specifications & documents.

SpecificationsD-Concertina

Concertina: Standard razor-wire concertina of any diameter (open design)
Configurations: Retrofit: 2 sensing wires inside an existing coil · New: coil and system supplied
Concertina sensor: 120 × 37 × 42 mm
Fence length: No fixed limit (practical limitation)
Fence height: According to customer specification
Length of system zone: Not exceeding 100 m
Unit dimensions: 250 × 55 × 25 mm, 200 g
Processing unit: Up to 32 sensors
Deflection force: 15 kg and above activates the alarm
Dry contact: N.O. & N.C. 1 A @ 48 VDC
Power supply: 12 mA @ 48 VDC
Communication output: RS232
Operating temperature: +72 °C to −25 °C
Storage temperature: +80 °C to −32 °C
Humidity: 95 %
Corrosion: All parts treated to MIL T 152
Lightning & electronic transients: MIL STD 9094
EMI & RFI: MIL STD 461, 462
False alarm rate (catalogue): Less than 1 per km per 3 months
MTBF sensor: 4.7 × 10⁸ hours
MTTR: 30 minutes
Warranty: 10 years on the sensors

Specification text, ready for your tender.

Copy it into your specification. It describes the system by what it must do, so any alternative has to meet every point.

D-ConcertinaTender specification textDatasheet

General
The system shall be D-Concertina by D-FENCE Electronic Fencing and Security Systems Ltd. (ISO 9001:2015 certified quality management), or an approved equivalent that meets every requirement in this section.
Function
Standard razor-wire concertina turned into a detection line: strain-gauge sensors report the exact zone of a cut or climb.
The system shall provide
- Barrier and detection: A coil that is very hard to penetrate, with the exact alarm point shown in the control centre.
- Retrofit option: Sensors on sensor posts, with two wires stretched inside the existing concertina.
- New-fence option: Supply and installation of both the open-design concertina and the electronic system.
- Flexible management: Locally, remotely, from a central control centre or a monitoring centre.
- Walls and fences: On wall crowns, at the foot of a wall, or on chain-link and welded-mesh fences.
Technical requirements
- Concertina: Standard razor-wire concertina of any diameter (open design)
- Configurations: Retrofit: 2 sensing wires inside an existing coil · New: coil and system supplied
- Concertina sensor: 120 × 37 × 42 mm
- Fence length: No fixed limit (practical limitation)
- Fence height: According to customer specification
- Length of system zone: Not exceeding 100 m
- Unit dimensions: 250 × 55 × 25 mm, 200 g
- Processing unit: Up to 32 sensors
- Deflection force: 15 kg and above activates the alarm
- Dry contact: N.O. & N.C. 1 A @ 48 VDC
- Power supply: 12 mA @ 48 VDC
- Communication output: RS232
- Operating temperature: +72 °C to −25 °C
- Storage temperature: +80 °C to −32 °C
- Humidity: 95 %
- Corrosion: All parts treated to MIL T 152
- Lightning & electronic transients: MIL STD 9094
- EMI & RFI: MIL STD 461, 462
- False alarm rate (catalogue): Less than 1 per km per 3 months
- MTBF sensor: 4.7 × 10⁸ hours
- MTTR: 30 minutes
- Warranty: 10 years on the sensors
Detection sequence
1. Coil on sensor posts: Razor-wire concertina of any diameter mounts on arms or posts with strain-gauge sensors.
2. Sensing wires: Two wires run inside the coil and connect to the sensors.
3. Detection: A cut, climb or push of 15 kg and above changes the tension and raises the alarm.
4. Control centre: The alarm and its exact zone reach a local, remote or central control centre.
Submittals
Before installation, the contractor shall submit the manufacturer's datasheet, the installation instructions and the zone layout for approval.

D-Concertina | Tender specification text

1. General
The system shall be D-Concertina by D-FENCE Electronic Fencing and Security Systems Ltd. (ISO 9001:2015 certified quality management), or an approved equivalent that meets every requirement in this section.

2. Function
Standard razor-wire concertina turned into a detection line: strain-gauge sensors report the exact zone of a cut or climb.

3. The system shall provide
- Barrier and detection: A coil that is very hard to penetrate, with the exact alarm point shown in the control centre.
- Retrofit option: Sensors on sensor posts, with two wires stretched inside the existing concertina.
- New-fence option: Supply and installation of both the open-design concertina and the electronic system.
- Flexible management: Locally, remotely, from a central control centre or a monitoring centre.
- Walls and fences: On wall crowns, at the foot of a wall, or on chain-link and welded-mesh fences.

4. Technical requirements
- Concertina: Standard razor-wire concertina of any diameter (open design)
- Configurations: Retrofit: 2 sensing wires inside an existing coil · New: coil and system supplied
- Concertina sensor: 120 × 37 × 42 mm
- Fence length: No fixed limit (practical limitation)
- Fence height: According to customer specification
- Length of system zone: Not exceeding 100 m
- Unit dimensions: 250 × 55 × 25 mm, 200 g
- Processing unit: Up to 32 sensors
- Deflection force: 15 kg and above activates the alarm
- Dry contact: N.O. & N.C. 1 A @ 48 VDC
- Power supply: 12 mA @ 48 VDC
- Communication output: RS232
- Operating temperature: +72 °C to −25 °C
- Storage temperature: +80 °C to −32 °C
- Humidity: 95 %
- Corrosion: All parts treated to MIL T 152
- Lightning & electronic transients: MIL STD 9094
- EMI & RFI: MIL STD 461, 462
- False alarm rate (catalogue): Less than 1 per km per 3 months
- MTBF sensor: 4.7 × 10⁸ hours
- MTTR: 30 minutes
- Warranty: 10 years on the sensors

5. Detection sequence
5.1 Coil on sensor posts: Razor-wire concertina of any diameter mounts on arms or posts with strain-gauge sensors.
5.2 Sensing wires: Two wires run inside the coil and connect to the sensors.
5.3 Detection: A cut, climb or push of 15 kg and above changes the tension and raises the alarm.
5.4 Control centre: The alarm and its exact zone reach a local, remote or central control centre.

6. Submittals
Before installation, the contractor shall submit the manufacturer's datasheet, the installation instructions and the zone layout for approval.