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Trusted Traders

Sentry Alarms Security Systems Ltd

Logo on white
Opening Hours
Today - 08:00–17:00
  • Monday 08:00–17:00
  • Tuesday 08:00–17:00
  • Wednesday 08:00–17:00
  • Thursday 08:00–17:00
  • Friday 08:00–17:00
  • Saturday 08:00–13:00
  • Sunday - Closed
Profile thumb alarms system logo

4.8

11 Reviews

About

We are specialist providers of Alarm Systems and Alarm Monitoring services in Hertfordshire and surrounding areas.

The company was founded in 1988 with the aim of exceeding the levels of service and installation quality available without the excuses or high prices often associated with the industry. Whether you require a new Alarm System for your house or business, an upgrade to existing intruder systems, an upgrade to alarm monitoring or a maintenance contract, we can help.

We still maintain systems installed in 1988 and our early customers recommend us to friends and relatives. 90% of our new work comes from referrals. As SSAIB (Security Systems and Alarms Inspection Board) and Police Registered installers, you can be assured your security needs are in safe hands.

Should you require further information and costs on our Alarm Systems, Intruder Systems or Alarm Monitoring services, our surveyor will visit you to discuss your requirements and design a system which exactly suits your needs and budget.

What we do

  • Alarm and security equipment installers

    • Alarm installation
    • CCTV installation
    • Door entry systems
    • Access control
  • More Services

    • alarm systems and security burglar alarms

Customer reviews

Reviews summary

4.8
11 reviews
Customer Service
4.9
Quality
4.9
Value
4.7
Sort by
Professional service
Customer Service
Quality
Value
Sentry Alarm staff were always helpful and explained the products they offered in a clear and understandable way. The specification they provided was detailed and easy to understand. They were neat and tidy while installing the system and gave a full explanation on how it worked.
Jacqueline, Hertfordshire27/03/2017
We've used them before
Customer Service
Quality
Value
Sentry installed our alarm in our last house and we didn't hesitate getting them in to our new house. Always prompt, professional and understanding of our needs. The fitter was a clean and tidy worker and talked through everything.
Grant, Hertfordshire02/02/2017
Excellent in all respects
Customer Service
Quality
Value
Delighted with both the service and product. Tim gave us great faith in the product when we first met, and I appreciated being shown the items I would be buying. Incredibly impressed with Owen, who had a friendly, professional approach, and he was more than happy to go over (and over!) how the alarm worked before he left. The fact that he came out to put up the boxes ahead of time, and then returned afterwards to do some further work was a huge bonus. We are pleased we went with Sentry, and thank them for their time and expertise. I have already recommended them to neighbours and wouldn't hesitate in recommending them in the future.
Delius15/12/2016
Excellent installation
Customer Service
Quality
Value
Sentry Alarms were recommended to us by a neighbour. They were very fast to quote and the installation was very professional. Would recommend to anyone.
Andy, Hertfordshire02/03/2016
Prompt and most professional.
Customer Service
Quality
Value
Paul Brooks arrived on time, worked quickly and well. He was most helpful and cleared any mess. So far I am delighted with the work.
Hazel, Hertfordshire30/09/2015
Good job
Customer Service
Quality
Value
Paul upgraded the security alarm system. The work was prompt and professional, and he explained everything clearly.
Stephen, London31/03/2015
Excellent job
Customer Service
Quality
Value
They were responsive to our enquiry, extremely professional in their presentation & quotation. The installing engineer was on time, thoroughly knew his stuff & explained the system in clear 'layman's' terms. I would not hesitate to recommend them.
Stuart, London12/12/2014
Fast, efficient and very tidy job
Customer Service
Quality
Value
Sentry Alarms carried out the installation to a very high standard with minimal disruption and within a week or accepting the quotation. Very professional and helpful staff.
Tim, Hertfordshire03/12/2014
Which? Local Review
Customer Service
Quality
Value
Sentry's quoted works and price were the best from a number of quotes we had from a number of local and not-so-local firms. Other firms proposed works involved a lot of disruption: lifting up of newly-laid carpets, lots of drilling and cutting chases in walls and no making good of any plasterwork required as a result. A very local firm's quoted price was way above the other quotes - either they didn't want our business or they were adjusting their price according to the area we live in and what they felt they could get away with. The guys who installed the system were polite and friendly and consulted us each step of the way before drilling holes and siting sensors and the control boxes. Disruption and dust were kept to a minimum. The only issues we had with the finished installation were that the PIR in the landing flashed very bright, startling anyone using the loo in the middle of the night; also the front bell-box was red and the red leds flashed very brightly - we probably should've checked this before accepting the quote, but nevertheless, these issues were sorted out quickly and without fuss to our complete satisfaction. We'd recommend Sentry alarms to anyone wanting a home security system installed.
giskard02/06/2011
Which? Local Review
Customer Service
Quality
Value
Sentry alarms installed my neighbours system and following a recommendation in Which Local, I arranged for a quotation and subsequent installation. In comparison with several other quotes they priced the work at a realistic price. Documentation provided was excellent, clearly setting out work to be done and price options. The installation was very professionally installed and continues to be trouble free. Highly recommended.
Dan4201/05/2011