Choosing Closed Circuit Television or CCTV, in short, is a daunting task as there are several brands, types, prices, and technologies in the market. Some of the most important things you need to consider include the type of output, minimum illumination, the location of placement, video resolution, and control mechanism. These attributes will help you choose the best Chester CCTV system that will satisfy your needs.
Analogue or digital?
You need to decide whether to buy a digital or analogue CCTV Chester. The major difference between the two is in the way they record and store information. Digital CCTV stores files in an internal memory device such as a memory card while analogue cameras store in a VHS recorder.
analogue cameras will also allow you to record from one camera at a time. Apart from this, there are several limitations with what you can do with the footage using analogue cameras. According to me, the best choice would be digital cameras.
Location of placement
When it comes to the location of placement, CCTV can be divided into indoor and outdoor devices. Indoor devices are usually placed inside the building. The most common indoor cameras are Standard Box Camera and Dome (ceiling) camera.
Outdoor devices are placed outside the building and exposed to outdoor weather. This is why most of the outdoor CCTV devices usually have a casing to protect the cameras from dust, rain and extreme temperatures. Bullet CCTV is the most common type of outdoor CCTV.
Bullet CCTV has a waterproof casing and mostly equipped with infra-red Led. Apart from the Bullet CCTV, standard box cameras with additional housing can also be used as an outdoor camera.
CCTV cameras require minimum illumination to capture the video properly. It is important to ensure that sensitivity fits the illumination level in the room where the CCTV is located. The minimum illumination required by a camera is defined as minimum LUX.
CCTV can be categorized into two groups based on their minimum LUX that is Day-night surveillance and Day surveillance. Day surveillance is used to monitor a room with sufficient illumination that is above 0.5 LUX while day night surveillance camera is used in a room with low illumination below 0.5 LUX.
The control mechanism enables you to adjust the angle and focus of the CCTV camera. A CCTV camera can either be classified as a motorised or fixed device. The motorised device has a built in motor to control the angle of view and focus remotely. Fixed devices have fixed angle and focus that must be set manually during installation.
Video resolution refers to the Number of Television Lines (TVL). The higher the bigger the number of TVL, then the higher the video resolution. A higher video resolution CCTV will produce a sharper image. However, a high-resolution camera also requires a high-resolution monitor to be able to display captured images.
CCTV cameras are divided into 3 types: high-resolution CCTV, standard resolution CCTV and Low-resolution CCTV.
In order to work properly, the CCTV camera should have the proper design and technology. The attributes above are very important as they will help you understand the classification of the products and help you find the right one.