Davis Derby is a long established designer and manufacturer of intrinsically safe electronics and explosion-proof electrical equipment. Davis Derby supplies a specialised range of control and monitoring equipment products for use in the mining industry to improve safety and productivity in this hazardous industrial environment.

Demux Video Services Ltd is a leading forensic multimedia analysis and software company, specialising in the clarification and Demultiplexing of CCTV images and footage as well as audio material.

Derwent Systems is a industry leader in the field of Infra-Red technology - an essential element for effective night-time CCTV surveillance and ANPR.

Detectortesters is a designer and manufacturer of testing technology for fire detection systems. In-house expertise across a range of technical disciplines means they are able to constantly innovate and develop new technology to bring new ideas and solutions to both users of their products and anyone with a responsibility for fire safety.

deView Europe is a premier imaging and sensing company, part of the world's premier OEM/ODM CCD camera and LCD monitor provider. The group actively supports and services customer relationships through offices based in Europe, North America and Asia. The company is a leading provider of LCD panels, day night cameras, wide dynamic cameras, recorders, ancillary products and more.

Digi provides the industry’s broadest range of wireless products, a cloud computing platform tailored for devices, and development services to help customers get to market fast with wireless devices and applications.

Digital CCTV Ltd. is a UK based technology company with many years of experience. Digital CCTV has developed intelligent security and communication technology solutions since 1998 and is well placed to advise customers on applications and system designs.

Through their 24/7 Security Operations Centre, DigitalXRAID delivers cyber security strategies to organisations that enhance the security posture and reduce the risk, cost, and reputational damage of a breach.

Dimension Productions Limited is a UK manufacturer of the handySet portable colour, battery powered test monitor, including the new HandySet technical portable test monitor. DPL is a design consultant for closed circuit television CCTV systems, project managers, technical writers for CCTV installations and programmers of bespoke software for the CCTV industry.

DORMA is a globally active supplier of door technology products and systems. The company is the world market leader in door controls, movable walls and automatic door systems. The DORMA Group is subdivided structurally into five divisions: Door Control, Automatic, Glass, Security / Time and Access and Movable Walls. DORMA maintains major production plants in several European countries plus Singapore, Malaysia, China and North and South America.

DroneOps specialises in the commercial application of Small Unmanned Aerial Systems (SUAS) and robotics. They research and develop new capabilities for drones to work in the commercial, security and defence arenas.

DRS Technologies is a leading supplier of integrated products, services and support to military forces, intelligence agencies and prime contractors worldwide. DRS holds leading market positions in thermal imaging devices, combat display workstations, electronic sensor systems, power systems, rugged computer systems, air combat training systems, mission recorders, deployable flight incident recorders, and environmental control systems etc.

DS Security is a pioneer UK Security company providing Security Services throughout the United Kingdom. Their security camera systems, access control and asset protection solutions provide a real deterrent and the peace of mind having a full record of any event or problem if needed.

DSSL Group is a specialsits in Closed Circuit Television, Access Control and Integrated Systems. The company expertise in development, installation, maintenance and integration of CCTV, access control (wireless, fibre and hard wired) and perimeter protection systems gained with various organisations.

D.W. Price Security was established in 1998 by the current directors who each have more than 30 years experience within the physical security sector. The products include, door sets, counters, glazed screens of varying type, windows of varying type, transaction facilities and a comprehensive range of ancillary products.