Security

Cameras

Wireless and Wired Security Cameras

Wireless

Increasingly popular is wireless transmission but remember that CCTV cameras require power to operate. The voltage is usually in the range 9-12V DC and this is typically derived from a small power supply plugged into the mains supply. So "wireless" does not mean totally "wire-free". There are battery powered cameras available but their battery operation is measured in hours, so is not suitable for permanent installations. However, it is often easy to pick up the power for the camera in some areas such as the loft of the house. Wireless systems are ideal where it would be difficult to run the video cable back to media control system.

Even the small covert type of camera can be supplied with its own built-in transmitter.

Wired CCTV

Wired cameras guarantee zero interference and can be positioned hundreds of metres away from the monitoring/recording equipment. Often with wired cameras we do not have to power the camera locally. Instead one cable will take both power and video signal back to the recording device.

Cameras

The traditional CCTV camera has a very industrial style look and feel and, therefore, many people would not find this suitable for fitting to their homes. These types of top-end cameras are usually specified without a lens, this is to give the required focal length and field of view.

Fortunately, for those of us with more down-to-earth budgets, modern technologies now allow the production of cameras with excellent performance. There are two common types of CCTV cameras, CMOS and CCD. CMOS based cameras are generally cheaper but do not produce as clear or sharp images as CCD cameras. However, they are ideal inside the home as children monitors or general checking of the home while away. CCD cameras provide pin-point clarity and should be specified outside the home wherever possible.

Integrated cameras and lenses are sealed to prevent ingress of moisture. The sealing is so good that they could be permanently immersed to some considerable depth in water. Integrated cameras do not need a heater and their small size makes them highly suitable for fitting to domestic and commercial properties.

Colour or monochrome?

The human eye remembers and recalls things better if they appear in colour - it''s easier to track down a brown-haired person wearing a red sweater and blue jeans than a dark, grey-clad figure that would be produced in monochrome.

Cameras can be supplied with built-in Infra Red (IR) sensitivity. This can be particularly useful where planning permission makes extra lighting impractical or the security requirement is such that intruders should not be alerted to the existence of CCTV surveillance.

Indoor/outdoor cameras

If a camera is to be sited outside and is not going to be mounted in an enclosure it must be classed as weather resistant. All of our outdoor cameras are fully weatherproof and the cable entry points are sealed.

Day/night cameras

Very popular in domestic and small commercial CCTV applications, day night cameras allow great quality, recording during daylight hours. When light levels drop below a certain level the camera's infra red LED's, if fitted, allow the camera to continue recording good quality footage even in complete darkness. The distance the cameras will see at night is dependent on the strength of the LEDs.

Motion Detectors

Some of our cameras are supplied with VMD (video motion detector), this is a modern alternative to the PIR. It works by analysing the video signal from the camera. When it detects changes in the signal it recognises this as movement within the camera's picture, the output being used to switch on the recording device. The sensitivity can be adjusted which will overcome the problem of bright lights being turned on causing the VMD to activate.

The more sophisticated units feature an on-screen marker or rectangle. Only movement in the rectangle will trigger the output. By resizing and repositioning the rectangles it is possible to allow for pet activity within the observation area. Where the camera sees a little of the road at the front of the house the camera can be setup to ignore movement on the road, eg. the car turning into the drive will activate recording but the car passing on the road will not. It is difficult to achieve this degree of accuracy with PIRs.

Home Innovation

Our systems will provide you with a cost effective method of delivering a high specification system.

Your installation can allow remote viewing, using the internet. It can include an alert wizard, send email with photo or video clip, and can even include SMS alert and audio alert.

We offer a low-cost all-in-one solution that does away with the need for separate motion detectors, splitters, quads or multiplexers.