CCTV systems

Cameras are the frontline equipment in CCTV systems. Proper selection of the same with precise understanding of the area and parameters, that will be under surveillance, will result in best quality output in accordance with other supplementary equipments. 

Lenses will project the perceived image, of the area under surveillance on to CCD, which in turn converts the same into video signals. Different kind of lenses are used in CCTV application, depending on situational demands. Please browse through to understand them further. 

Switchers are the simplest image management devices. They organize the images in three ways. Images will sequentially appear if kept in auto; or individual images can be selected manually, or unwanted images can be by passed as required.

QUAD Devices are the intermediatory range image management devices in terms of cost and features. Recording video images, by employing this unit is possible, as in addition to monitor output it has a VCR output. Display will be in quadrant fashion with four camera images simultaneously appearing on screen. Playback of recorded images will be in the same manner.

Multiplexers are the high end image management devices with host of features. Unlike QUAD units they do not suffer image compression while play back. Please browse through for further information.

Monitors are the out put devices. Two types of monitoring devices can be employed on the output end.

Time Lapse VCR is used for recording cctv images in an uninterrupted fashion. They do not need any kind of special video cassette. Any 180 minute vhs cassette can be used which is a cheap medium for video recording. Unlike the conventional home vcr, recording does not gets completed within 3 hours. Use the same 180 minute cassette and obtain video recording for longer periods of time. Models available are. 

Pan Tilt Devices are used in conjunction with cameras which are expected to cover larger areas. While multiple camera option on out doors is not economical to cover the same, single camera with motorized zoom lens and pan tilt devices are used to grab the optimum performance.

Telemetry Devices will communicate with pan tilt zoom cameras over longer distances. When conventional 12 core cable becomes an expensive preposition to cover longer distances, telemetry device utility will reduce the cabling need either to 2 core cable in looped fashion or the same coaxial cable which sends the video signal, depending on the model employed.

Video Amplifiers will enhance the video signal strength either when there is a loss because of longer distances or when signal weakening due to one source & multiple distribution points.

Camera Housings will protect the sensitive and expensive CCTV equipments from hazardous external elements. They are necessary in general but mandatory in certain conditions.