Know what you’re looking for while installing CCTV cameras:
Residential Property (Flat, Independent floor/house, apartments): The analogue high definition cameras (AHD) are best suited for residential properties. They are available in 1, 1.3 and 2MP variants.
Small Shops and Offices: Similar to residential properties, cameras best suited here are AHD cameras. They might require a different lens for a few specific cameras to get additional focus in a specific area or extra coverage in smaller rooms. A 4-camera set is the most popular choice for such smaller setups.
Large Commercial Properties (Manufacturing plants, warehouses, malls, societies): For basic surveillance, a larger number of analogue cameras would do the needful but to cover larger areas with high security, PTZ cameras with high focus (10x-30x)are required. A Bifocal lens is suitable for the cameras. The IP-based NVR cameras are becoming popular for such purposes as they provide flexibility of scaling the number of cameras and long distance recording using switches.
Important components of a CCTV system:
CCTV Cameras: Cameras are available in High Definition (HD) and standard definition (SD) quality. An HD camera generally costs about 1100-1500 rupees whereas an SD camera costs somewhere between 600-1200 rupees. A Dome shaped camera is used indoors and a bullet camera is preferred to use outdoors. There are a variety of brands ranging from Hikvision to Sony and other budget brands from where the selection can be made.
Digital Video Recorder: This is the central unit which is used to process and record the video from CCTV cameras. The digital video recorder should be preferably of the same brand or should be compatible with the cameras. For the DVR to be compatible it should support the technology being used in the CCTV camera (HD-CVI, AHD etc.) and should support the resolution.
Cable: The wire used to connect CCTV cameras is a ‘’3+1 copper wire’’ which is provided in 90mtrs Bundles. A ‘90mtr bundle’ is sufficient for a 4 camera installation. A bundle costs between INR 600 – 1100. The cost depends upon quality of wire i.e. full copper Vs. Copper coating Vs. Aluminum wire.
Hard-Disk Drive: A Hard-Disk is used for Backup of recording and is attached to the DVR. The HDD for CCTV ranges from 500 GB to 2TB. A 1TB HDD can give 30 days of backup for a set of 4 cameras (1.3 MP) whereas a 500 GB HDD would give up to 15 days of backup for the same set. Special HDD is used for surveillance purposes as general HDD are not designed for 24x7 usages.
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