
Intruder Alarm
A full-service security package for Intruder Alarm Systems for any industry or organisation. From installation, and servicing, to monitoring alarms, you will be covered. Contact us today to discover our security alarm systems.
Intruder Alarms to Protect Your Business
Intruder Alarms
Churches Fire & Security provide Intruder Alarms to protect businesses as part of overall security solutions.

What Is An Intruder Alarm?
An Intruder Alarm detects unauthorised entry to your premises and raises the alarm, either locally or through an Alarm Receiving Centre.
There are many systems to choose from that fit particular business needs, with two main types of Intruder Alarms that operate differently from each other; a wired or wireless system.
A wired Intruder Alarm is the most commonly used system. Wired systems comprise of a main control panel, motion sensors, panic alarms and break glass sensors.
Wired Intruder Alarms require wires running to each of the sensors on the system, which are then hidden away out of site.
A wireless system works in the same as a wired system, however detection is relayed to the control panel via radio frequencies.
Wireless Intruder Alarms are best suited to the following locations:
- Properties of heritage and historical significance
- Buildings that cannot afford the time and disruption that wiring installation can cause
- Temporary installations
- Buildings where an Intruder Alarm is required promptly
Installing a wireless system is much quicker than a wired system – the average detector takes 5 minutes to install as compared with 4-6 hours for a wired system.
Learn more about how Churches Fire & Security install and service Intruder Alarm Systems in our downloadable pdf.
Download Intruder Alarm Info
Choosing An Intruder Alarm
When you have a requirement for an Intruder Alarm in your business, you will need to assess which entry points and locations you wish to have covered. This investigation will identify where alarm detectors should be placed in order to give the optimum security coverage.
An Intruder Alarm Systems expert from Churches Fire & Security can survey your site to consider your business requirements. They will then produce a plan of precisely how your detectors and Intruder Alarm should be installed on your premises to the relevant business specifications. The expert will also look at the likelihood of theft, the ease of disposal and the value of goods on site.
You should take into consideration what it is that you would like the Intruder Alarm System to achieve and take advice on how to meet your requirements.

Intruder Alarm Grading
Grade 2 - Medium Risk
For a Grade 2 system, potential thieves are expected to have an interest due to the property having items of value on site, and therefore are expected to have limited knowledge and tools to compromise the system.
Typical applications – household and low risk commercial
Grade 3 - Medium - High Risk
Properties with significantly high value items benefit from Grade 3 systems. It is likely that potential thieves have knowledge and a range of tools at their disposal to compromise the Intruder Alarm.
Typical applications – Commercial and high value properties
Grade 4 - High Risk
Persons targeting properties with a Grade 4 system would be sophisticated in their theft. They would likely have a plan, detailed information and access to a number of tools to compromise the system.
Typical applications – banks, museums, art galleries


Alarm Signalling
Bells are the most basic option of Intruder Alarm signalling. As the system is triggered, a loud alarm sounds to signify that an intruder has entered, or is attempting to enter, the premises. The bell sounding can be suited to the specific location in high density areas (such as a housing estate) where the alarm can be responded to by people in the area, the police force or neighbours.
The monitored system can alert in two different ways. A nominated key holder can be alerted, or the signal is sent to an Alarm Receiving Centre (ARC). If part of the service agreement, the ARC can then alert the key holder or initiate a police or security response.
How Often Should An Intruder Alarm Be Serviced?
Ongoing maintenance and alarm servicing of the system by a competent approved security systems company should be carried out.
Your Intruder Alarm maintenance will include a call out facility with a minimum response time as per the agreement. This will ensure any emergencies are attended to promptly.
All Intruder Alarm Systems should have a preventative maintenance visit where tests are carried out to ensure the system operates at an optimum level and any failing parts are replaced before they cause a major malfunction. These tests should be carried out annually.
FAQs
What Is The Difference Between A Burglar Alarm And An Intruder Alarm?
Click to find outIn practice, the terms Burglar Alarm and Intruder Alarm mean the same thing: a system that detects unauthorised entry. Burglar Alarm is commonly used for homes, while Intruder Alarm is the term used in most British and European Standards, and for commercial systems. Churches Fire & Security can design and install Intruder Alarms for businesses of all sizes.
Are Intruder Alarms A Legal Requirement?
Click to find outMost businesses are not legally required to have an Intuder Alarm. However, many insurers require one as a condition of cover, often to a specified grade and installed by an NSI or SSAIB approved company.
Can My Intruder Alarm Get A Police Response?
Click to find outYes, if the system meets police requirements. It must be installed and maintained by an NSI or SSAIB approved company, monitored by an approved Alarm Receiving Centre (ARC), and registered with your local police force. When the alarm is triggered, the ARC confirms the activation before requesting a police response. Ask us about Intruder Alarm Monitoring for your business.
How Is An Intruder Alarm Wired?
Click to find outIn a wired Intruder Alarm, each sensor, detector and keypad is connected to the control panel by cables which carry power and signals. Wired systems are very reliable and need no sensor batteries which makes them a good choice for new builds and refurbishments. Where running cables is impractical, wireless or hybrid systems are available.
How Is An Intruder Alarm Designed For My Premises?
Click to find outEvery Intruder Alarm Systems starts with a site survey and risk assessment by our team. We look at your premises, entry points, contents and insurance requirements to decide the grade of system needed under BS EN 50131. Churches Fire & Security can design, install and commission the system that will meet your business requirements.
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Protect your business, staff, customers and assets with Churches Fire & Security safety solutions. Expertise from start to finish and we are fully compliant, ensuring you’re covered.
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