CCTV stands for
Closed Circuit Television, which refers to a surveillance system using cameras that send their signals back to a specific location. These video images can be monitored live, or stored for viewing later. CCTV systems are most often used to monitor stores, banks, and public buildings, etc . However , with the technology becoming more and more affordable, and easier to use, many people are actually installing CCTV cameras in their homes and businesses for added security. In larger stores, the CCTV cameras are often less visible. They can have high-resolution digital cameras that may be mounted in smoke detectors, sprinkler heads, thermostats or clocks. It is also very popular to mount these cameras in ceiling tile domes (they are bubble-like and tinted so no one can see where the camera is pointed). From this vantage point, a pan/tilt/zoom camera can swing about and follow someone around the store. There are many accessories in using CCTV -
Camera Lenses: CS and C Mount, Fixed and Varifocal, Manual and Auto Iris, 2 . 9 - 8 mm, 5 - 50 mm, 4 mm, 6 mm. 8 mm, 12 mm, and 16 mm, Pinhole Lenses & Manual Zoom Lenses available.
Mounting Brackets: Universal mounts for all CCTV cameras. PanaVise 6" dual option mounts, heavy duty plastic mount, and mini metal mount
Industrial-grade Camera Housings: Attractive & compact Ganz's housings for indoor or outdoor camera installation. Unique slide-off feature allows full accessibility to the camera and lens. Wide variety of options.
IR LED Illuminators: IR lights up to 15ft, 45ft, 70ft, 100ft, 160ft & 310ft in total darkness, 850nm, Invisible rays to human eyes, Compatible to true day/night & B/W CCD cameras.
If you need more comprehensive explanation about CCTV you can go to
jual CCTV.