Intruder Alarm Systems

Reliable Intruder Detection and Alarm Systems

An intruder alarm is one of the most effective measures you can take to protect your premises against burglary and unauthorised access. A visible alarm system acts as a powerful deterrent, while the detection and notification capabilities ensure a rapid response in the event of a break-in.

HS Contracting Services Ltd designs and installs intruder alarm systems for commercial, industrial, and residential properties throughout Surrey and the South East. Every system is tailored to the specific risks and layout of your premises, and we offer a range of monitoring options to suit your requirements and budget.

Our Intruder Alarm Solutions

Wired Alarm Systems

Hardwired intruder alarm systems are the traditional choice for new-build or refurbishment projects where cabling can be installed during the construction phase. Wired systems are exceptionally reliable, immune to wireless interference, and well suited to larger buildings with extensive detection requirements. All wiring is installed discreetly and tested thoroughly during commissioning.

Wireless Alarm Systems

Wireless alarm systems use radio frequency communication between detectors and the control panel, eliminating the need for extensive cabling. This makes wireless systems ideal for listed buildings, retrofit installations, and premises where minimal disruption is essential. Modern wireless technology delivers the same reliability and performance as wired equivalents.

PIR Sensors and Motion Detection

Passive infrared (PIR) sensors form the backbone of most intruder alarm installations. We use high-quality sensors with adjustable sensitivity, pet-immune options, and anti-masking technology to minimise false alarms while ensuring reliable detection. Dual-technology detectors combining PIR and microwave sensing are available for areas that demand enhanced verification.

Magnetic Contacts and Shock Sensors

Magnetic door and window contacts provide perimeter protection by detecting when an opening is breached. Shock sensors (vibration detectors) detect physical attacks on walls, doors, and windows before entry is gained, providing an early warning layer. Together, these devices create a robust perimeter defence around your premises.

Bell Boxes and Sirens

External bell boxes serve a dual purpose: they act as a visible deterrent and produce a high-volume audible alarm when the system is triggered. We install tamper-proof, weather-resistant bell boxes with integrated strobe lights to maximise the alert impact and deter intruders.

Remote Monitoring and Alerts

Modern intruder alarm systems can be connected to a monitoring centre or configured to send alerts directly to your smartphone. Remote monitoring ensures that every alarm activation is responded to promptly, even when your premises are unoccupied. We can arrange monitoring through accredited alarm receiving centres (ARCs) to provide round-the-clock protection.

Police Response

If you require police response to alarm activations, your system must be installed and maintained to the standards set out in PD 6662 and BS EN 50131. HS Contracting Services Ltd installs systems that meet these requirements, and we can assist with the Unique Reference Number (URN) registration process with your local police force.

Standards and Compliance

All of our intruder alarm installations are designed and installed in accordance with BS EN 50131 and PD 6662. We work to the grading and notification levels appropriate for your risk assessment and insurance requirements, ensuring your system is fully compliant from day one.

• Free site survey and risk assessment
• Wired, wireless, and hybrid system options
• BS EN 50131 and PD 6662 compliant installations
• Remote monitoring and smartphone alerts
• Police response URN registration assistance
• Planned preventative maintenance contracts
• 24/7 emergency callout and fault response