CCTV Installation Services

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CLOSE CIRCUIT TV (CCTV)

Closed-circuit television (CCTV) is a popular form of surveillance that uses video cameras to transmit a signal to a specific destination on a limited set of monitors in a closed network. Banks, airports, industrial plants, military installations, and convenience stores commonly use CCTV, which can operate continuously or can be activated to monitor particular events. CCTV is a popular tool not only for security, but also for monitoring the operations of a business or organisation.

When choosing CCTV for security or business needs, the key questions are what kind of camera to use, where to store the images and how to monitor and access them. A consultation with Guard Security can determine the answers to these questions, which depend on many factors including purpose, location and local conditions.

SECURITY CAMERAS

CCTV systems use many different camera types depending on the security needs. Common camera classifications among which customers can choose include:

ANALOG OR DIGITAL IP

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Analogue is the traditional CCTV application, whereby the cameras capture the analogue signal.  This is then transferred to the Digital Video Recorder (DVR).  Digital IP, on the other hand, converts the analogue image into digital format inside the camera and then it records to the Network Video Recorder (NVR).  There are flexible storage options available in both formats.

FIXED OR PTZ CAMERAS

Fixed cameras are mounted in a stationary position.  The other camera configuration is the pan-tilt-zoom camera (PTZ).  The direction, angle and focal length of a PTZ camera can be adjusted remotely via a computer, DVR, NVR or PTZ joystick, for better surveillance.  The flexibility makes PTZ cameras suitable for the monitoring of larger areas and public places with many points of interest, includingthe identification of moving people and objects.

INDOOR OR OUTDOOR

Outdoor cameras are built tough to withstand the elements, while indoor cameras can be more delicate. Infrared Security Cameras. Most cameras today are digital color with infrred LEDs, which films in color by day and in black and white IR by night. Infrared cameras provide the best picture in low-light viewing situations.

Indoor cameras usually tend to be more lightweight and smaller than outdoor cameras, since the latter needs to be able to contend with external factors such as varying weather and light conditions.

INFRA-RED SECURITY CAMERAS

Infra-red cameras allow for clear pictures in low-light viewing situations.  Most modern cameras have infra-red LEDs within the camera lens to allow for filming in digital colour when light is present, switching to black and white IR in low light or darkness.

VANDAL RESISTANT

An important consideration for cameras placed in vulnerable locations is their resistance to vandals.  Cameras open to potential vandalism tend to be made of more durable materials such as metal, or housed in casing difficult to open or impact.

DAY & NIGHT CAMERA

Infra-red cameras are able to adapt when there is a change in lighting conditions, as may be the case throughout the day into the night.  They usually film in colour during the day.  A photoelectric sensor is able to detect darkness at night-time, whereby the camera turns on the LEDs and then flips the camera to black and white.

DOME, BULLET, BOX & PINHOLE CAMERAS

Depending on which of the above classifications are selected, the camera shape, size and materials will vary.  For example, a dome camera is better suited to well-lit locations where ceilings are lower.  A bullet camera, on the other hand, has features that make it preferable in low-light conditions, such as operations at night-time.  For tight spaces, such as within lifts, a corner camera is well-suited.  If a camera is to also serve as a visual deterrent, a standard box camera is commonly used.  However, if the camera is to be placed with the intention of avoiding detection, a pinhole camera, characteristically small, is a better option.

DVR/NVR

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For the recording and storage of images and audio captured by your camera, Guard Group offer a wide selection of Digital Video Recorders (DVR) and Network Digital Recorders (NVR).  Both options offered by Guard Group have many useful features, making the searching of footage easier.  They also maximise the use of disk space.

Being PC-based, what is recorded by the cameras on DVR and NVR systems is stored on a HDD (Hard Drive).  This makes the video and audio archive easier to access, and enables remote viewing when necessary through the Internet.  For permanent storage, DVR and NVR also make it easier to transfer data to DVD, USB and other formats.

SECURITY MONITORS

Security footage is viewed through Security Monitors.  Depending on the specific requirement, a range of different monitors are available.  The most commonly used CCTV monitors are LCD flat panel monitors, valued for their clarity and visual appeal.  Other options include touchscreen monitors, public viewing monitors and monitors used in security stations.

RESIDENTIAL CCTV

We provide bespoke Residential CCTV packages. Please contact us for more information.