CCTV Detection Devices
Commercial > CCTV > Detection Devices
There are various types of detection devices and features that may be incorporated. The type and number of detectors will be specified by our company surveyor.
Detectors and Beams
External movement detectors or beams can be used on a site so that if movement is detected a PTZ camera can be panned round to the scene and an alert sent off. Particularly useful on unmanned sites and in conjunction with a monitored system.
Video Motion Detection
Works a bit like detectors and beams but no hardware is involved. Instead the software in the NVR is set to notice a change in the scene or when a virtual line in the image is crossed. The software can also be set to notice objects that have been left, for example a bag that has been left in an airport which could be suspicious. In some cases, this works well but unlike a movement detector which will pick up a solid object moving, the software is looking at a change of scene so can without proper adjustment be prone to false alarms. For example, the sun going behind a cloud will cause a shadow on the ground to disappear causing an activation. Movement and beam detectors are of course unaffected by these changes.
ANPR
Automatic Number Plate Recognition again uses software built within the NVR to recognise number plates and can even keep a database of valid number plates. These systems can further be interfaced with access control systems to say automatically open gates or barriers if the vehicle is on the database such as an employee’s car or raise an alarm if the vehicle is not on the database.
Monitors
Whilst NVRs now can connect to the internet and be viewable across devices remotely, it is often required that on site monitors are used. These can vary from a simple flat screen computer type 17” monitor to a complete array of large wall mounted screens viewing different areas both locally and remotely. Monitors are now High Definition (HD) or even 4K.
Public Address and audio Challenge
Where a monitored CCTV system is installed, both detection and audio challenge are required so that when the monitoring stations operator detect a potential crime in place they can speak to the culprit warning them to leave site before the police are called. The system requires several speakers or PA horns and an on‐site amplifier which is connected to the NVR.
Infra-Red (IR) Lighting
Most Cameras these days have their own in built infra‐red however these are limited to perhaps 10 or 12 metres. It is possible to flood light a complete area with infra‐red lighting. The advantage is that to the naked eye the area can be pitch black, making it harder for intruders to see valuables but to the camera or cameras the scene is brightly lit thanks to IR lighting
Towers and Columns
Cameras can be fitted to buildings and structures but in some cases such as large yards there are no buildings within the vicinity of the area that needs covering. Or perhaps the camera needs to be positioned higher than the building. Towers and columns come in various heights and features.
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Case studies
30/01/2026
Case Studies
Walmley Social Club Security Upgrade: Intruder Alarm and Addressable Fire Alarm Installation
Walmley Social Club is a busy, long-established private members’ venue in Sutton Coldfield, Birmingham, hosting everything from snooker and bowling to live music and large private events. To ens...
10/11/2025
Public Sector
Dr Milley’s Hospital Upgrades to a Modern Wireless Fire Alarm System
Location: Lichfield, Staffordshire Project: Wireless fire alarm system installation
04/06/2024
Residential
Comprehensive Security Upgrade for a Warwickshire Village Home
The Results
Our client, Mr Bryan Davis, commented: “I would like to thank you for your help and assistance with the alarms and CCTV, which are now fully inst...
14/06/2023
Schools
Bredon Hill Academy
Bredon Hill Academy is a well-regarded, 468-pupil middle school situated in the village of Ashton-under-Hill, four miles south of Evesham in Worcestershire.
15/05/2023
SMEs
Cookes Furniture & Storage
Cookes Storage Managing Director, James Pike, said he had been greatly impressed with the professionalism, service and attention to detail shown by the Justice team. “Initially, a very thorough ...
12/12/2022
Schools
The Shrubbery School
Founded in 1930, The Shrubbery School is the oldest co-educational independent school in Sutton Coldfield. Catering for children aged 3-11, the school operates from a part listed building and wa...
08/08/2022
Commercial
KLM Storage (Midlands) Ltd
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04/05/2022
Commercial
Lodent Precision Ltd
Lodent had experienced a series of costly and disruptive thefts from their yard on an industrial estate in Staffordshire close to the M6 toll road north of Walsall and Wolverhampton.
17/12/2021
SMEs
Green Frog Power
Summary/background of company Green Frog Power builds and operates power stations in the United Kingdom, supplying stand-by power to the National Grid. ...
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Sports
Aston Villa Football Club, Aston, Birmingham
Instalment/solutions provided:
Intruder alarm systems
Aston Villa FC is a premiership football club, with a ground capacity of around 40,000, the largest in the Birmingham area. ...
17/12/2021
Public Sector
Job Centres, Staffordshire and West Midland
Instalment/solutions provided:
Integrated intruder alarm and smoke cloak systems
Local Jobcentres in the West Midlands provide information on available work opportunities and fa...
17/12/2021
Schools
John Wilmott School Sutton Coldfield West Midlands
Instalment/solutions provided:
Wide range of school security systems
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04/11/2021
Commercial
TST Cosmetics Bodyshop, Wolverhampton
Instalment/solutions provided:
CCTV and intruder alarm installation
TST Cosmetics is part of the Innovative Repair Group, which runs vehicle bodyshops across Wales and the Midlan...
04/11/2021
Commercial
Chambers Ford motor dealers, dual sites
Instalment/solutions provided
Detector activated CCTV systems
Chambers Ford is a large, successful motor dealership with multiple sites across the country, including at Sutton Co...
22/06/2021
Construction
Bowmer and Kirkland
Bowmer and Kirkland was founded in 1923 and is one of the UK’s most successful privately owned construction, engineering and development groups.
22/06/2021
Local Authority
The Red Rose shopping Centre, Sutton Coldfield
Instalment/solutions provided:
Fire detection and alarm system
The Red Rose shopping Centre (Formerly known as the Sainsbury Centre) in Sutton Coldfield West Midlands is a shoppi...
22/06/2021
Residential
Multiple major house build companies
Instalment/solutions provided:
Intruder alarms
We have provided security solutions for most of the major house builders including Persimmon Homes, Laing, Bellway, Crest Nicholson...
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Retail
JD Sports
Instalment/solutions provided:
Intruder alarm & CCTV
JD Sports Retail was founded in 1981 and has grown over the years successfully acquiring other brand leaders such as First Sp...
22/06/2021
SMEs
SME's
Green Frog Power Builds and operates power stations in the United Kingdom. They supply standby power to the National Grid. Their sites are largely unmanned and Justice was contracted to come up ...
22/06/2021
Surgeries
Multiple doctor & dental surgeries
Instalment/solutions provided:
Integrated CCTV systems, Panic alarms and door access control devices
We have worked with a wide range of Doctors and Dental surgeries of differing...
21/06/2021
Banking
HSBC
HSBC is one of Britain’s largest Banks and has recently had a refurbishment of most of its Branches. Justice Fire and Security was contracted to carry out the upgrades and alterations to the Fir...