Intruder Alarms

From small 8 zone alarm systems in residential homes to a multi zone system in large commercial premises, Hennessy can undertake work on any alarm system, fitted by any company in any condition or age. We specialise in the takeover and ongoing maintenance of pre-installed alarm systems. Time and time again new customers move their systems to us for a better customer service and in most cases, to lower their costs.

As well as a trusted maintenance team, we also install new alarm systems to very high standards. Being NSI approved, all our systems are fitted within the regulations and come complete with 12 month warranty, technical support and an NSI certificate of completion.

We offer low cost alarm monitoring solutions using the world famous Dualcom. For as little as £99.00 per annum you can have peace of mind that our NSI Gold ARC (alarm receiving centre) will look after your property and react quickly when the time arises.

• Grade 2 or 3 system insurance approved
• Insurance company approved installation
• 24 hour monitored protection
• GPRS and IP signalling options available
• Anti-mask detection devices available
• Suitable for all commercial premises
• Installed and maintained by NSI accredited company
• Free security consultation

• Grade 2 systems
• Insurance company approved installation
• Sms text message notifications
• 24/7 monitored protection available
• GPRS signalling available
• Suitable for residential and small commercial premises
• Quick and easy installation
• Installed and maintained by NSI accredited company
• Free security consultation


We Install

  • Wireless Grade 2 Alarm Systems
  • Hard Wired Grade 2 & 3 Alarm Systems
  • Hi – Visibility External Alarm Siren Boxes
  • SMS Text Message Alerts & Automatic Voice Diallers
  • Single Path & Dual Path Alarm Monitoring
  • Key holder, Police, Medic, Fire Brigade & Security Response

We Provide

  • Free Site Survey
  • Installations
  • Service
  • Maintenance
  • Upgrades

We Work In

  • Residential
  • Offices
  • Commercial
  • Retail
  • Schools & Colleges
  • Leisure & Hotels

To find out more or to arrange a free site visit please complete the form below and we will be happy to help. We do not use salesman so you can be assured that your enquiry will be handled by the very best qualified and experienced fire and security personnel.