Intruder Alarms

Keep your business and staff secure with a professionally installed and maintained Intruder Alarm System

Book a FREE Site Survey

Or Request a Callback

    Or Call Us On:

    From Retail to Restaurant, Offices to Industrial

    SDS can secure your commercial premises with a NSI/Police approved intruder alarm system. Commercial alarm systems are often driven by insurance policy compliance. Being a NSI gold installer with over 30 years’ experience SDS has the knowledge to ensure that we design and install a suitable security system to keep your premises, contents and staff as safe as possible.

    Our surveyors will visit your premises to conduct a full risk assessment and can liaise with your insurance company, facility manager or builders, we will then produce a free no obligation quotation.

    SDS only supplies and installs top quality system components supplied by major manufactures in the commercial security industry with a proven record, all our systems will be accredited with a NSI compliance certificate upon installation and testing.

    After installation full training will be given to management and staff on system settings and requirements although modern security systems are very easy to use and our helpline is available 24 hours a day to assist if needed.

    Our alarms can be fitted with panic, fire, flood, gas and temperature sensors depending on your needs. Access control, CCTV and perimeter security can be fully integrated.

    We supply and install a variety of commercial intruder alarms and security systems to businesses operating across London and the South East. Our alarms are graded between 2-4 (we’ll advise you on what is right for your business) and signalling/detection types are as follows:

    Fully Integrated Systems

    A fully integrated security system combines a number of different security products into a solution that’s right for your business. Fully integrated systems maximise your commercial security by linking up standalone systems such as access control CCTV and perimeter security, giving you extensive monitoring capability and more control over your business security.

    You’ll have total control of business access whether you’re at work or on holidays, with visibility via the app on your smartphone or laptop. The experienced SDS team can conduct a free site survey and propose an integrated system that suits your business needs.

    Bells/Audible-only Commercial Alarms

    If your alarm is triggered most intruders will make a quick exit with a high pitched internal siren and external bell box activated. With an audible only alarm this is the end of the story unless neighbours or a passer-by reports it to the Police with specific evidence of a crime taking place.

    The bells will cease in 15 minutes and the alarm will reset omitting the previously activated sensor.

    Although current NSI / Police approved wireless alarms are as reliable as hardwired components the nature of your premises and business will usually affect which is suitable. Often a hybrid system consisting of both wired and wireless components will be used.

    Find out more about our intruder alarms

    Monitored Commercial Alarms

    Monitored alarms allow you, your key holders or our ARC (Alarm receiving centre) to be alerted if your alarm is activated. The most suitable monitoring will depend on budget, the risk level and insurance requirements.

    Guaranteed response from the emergency services requires monitoring via an ARC. Please see Monitoring for further information.

    More than Just an Alarm Supplier

    We understand that staff vigilance and holistic security thinking is just as important as security systems. We don’t just secure your businesses but educate you and your staff in security and pass on our years of knowledge and experience to give an insight to how intruders, thieves and vandals think and the vulnerabilities they will be on the lookout for.

    We also have tailored alarm maintenance packages, perfect for ensuring your alarm system continues working to the highest of standards. Maintenance on your intruder alarm system not only provides peace of mind that your system is working correctly, but also helps prevent false alarms in future.

    Find out more about our alarm maintenance services

    Detection Types

    We’ll assess what combination of sensors you need throughout your premises and advise on door & window contact sensors, motion/movement sensors, panic alarms, glassbreak detectors, acoustic detectors and vibration detectors depending on a number of factors and property risks. Our surveyor or office staff will be happy to advise you further

    Have An Existing Intruder Alarm System?

    If you’re unhappy with the levels of service you’re receiving with your current security company we happy to take-over existing systems so you can benefit from our high levels of customer service, maintenance and competitive rates. Talk to us today about how we can help.


    Gold Level Service

    SDS have been NSI Gold approved for 23 consecutive years.

    Gold status is only awarded to companies who consistently meet the industry’s highest standards through ISO9000 Quality Management as well as the relevant British and European Standards. NSI inspectors visit us, and random installations every six months.

    This is proof of our commitment to quality assurance and demonstrates that SDS work to the highest recognised industry standards as demanded by the police, fire and rescue services and insurance industry.

    Why SDS Security

    Free Property Security Survey from an experienced surveyor

    NSI Gold accredited for 23 consecutive years

    Over 30 years experience in installation and maintenance

    Kent and London-based fitting/maintenance teams

    SMS alerts or 24/7 security monitoring with police and keyholder notifications

    All staff are police checked for complete peace of mind