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FAQ about Security Systems > Security Systems > What is CCD?

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CCD (Charged Coupled Device) is one of the main elements used in Surveillance CCTV cameras to produce high resolution images in low-light conditions. CCD is basically a small silicon chip that receives light and turns it into voltage variations which makes up an image. It's usually measured in inches with 1/3" CCD being the standard. 

Some security cameras use CMOS (complimentary oxide semiconductor) which cost much less then CCD eventhough they work following saming principle "coverting light into electrons". However CCDs are more preffered for use in Security CCTV cameras as they produce a much higher quality images, generally have more pixels then CMOS and they have been manucfatured for a longer period of time.