Before purchasing the right CCTV and video surveillance equipment there is plenty to think about. Below we have listed some questions to ask yourself when it comes to buying surveillance equipment.
Why do I want to install CCTV?
It’s essential to start with a clear idea of what you want your CCTV system to achieve. Are you considering the investment as a deterrent to intruders and thieves? To record access to a building or car park? To monitor movement in particular areas of your property? To record activity round the clock or at specific times, for example when your property is unoccupied? You also need to think about what you want to do with the information once you have it. How long do you want to keep it? How often do you want to review it? With clear objectives, it’s easy to determine the criteria – such as picture resolution, camera focal length and image storage requirements – that will ensure your chosen system is fit for purpose.
Do I need site survey before installing CCTV ?
Site survey is nothning but proper plan on white paper before installing cctv system. Plan provides you proper plan of camera type and its lenses. As camera works in three modes a) Traffic b) Verification & 3) Identification.
Actully camera type vary with your requirement and budget. If are looking for analog camera TVL maters lot that is as per your purpose and if you are looking for IP camera, you need to check chose require pixels. Apart from type of camera, its very important taht survey engineer should be expert enough to calculate proper type of lenses as per your site loaction. You need to understand the following when choosing a cctv lens: Focal Length The Focal Length is measured in mm. As a guide: a short focal length (e.g. 2.5mm) = a wide angle of view a long focal length (e.g. 16mm) = a narrow angle of view the smaller the CCD Chip - the narrower the angle of view The size of the camera's CCD image device will affect the angle of view. CCTV Cameras come in different chip sizes - 2/3", 1/2", 1/3" and 1/4".