Choosing a Closed Rounds Television (CCTV) Camera is often confusing for most people. This is because CCTV products on the market have wide range of brands, types, price, technology, and quality. Furthermore, a lack of standardization in the industry also makes prospective buyers difficult to compare products collected from one of manufacturer to another. This article is written as a guide for new buyers to choose a suitable CCTV Cameras that fit their requirements. This article explains how to identify a CCTV product based on its most important attributes.
The most important attributes in a Security Camera are type of output, location of placement CCTV Camera, minimum brightness, control mechanism, and video resolution. Buyers should evaluate the attributes to distinguish a CCTV and select one that meet their requirements.
The output of Security Camera is the video signal sent by the device to a display monitor. A CCTV sends either Analog or Digital Output Signal.
Analog CCTV directs a consistent stream of video over Coaxial Cable. Majority of existing installation today are still using Analog Technology although Digital Technology is getting more acceptances in the market.
Digital CCTV directs individually distinct surging video over Twisted Pair Cable. Digital CCTV cameras are generally equipped with an Internet Protocol (IP) Address. Therefore, it is also generally known as IP Camera or Network Camera. By having an IP Address, the camera can be integrated easily with existing network facilities.
Based on the location of placement, CCTV can be divided into indoor and outdoor device.
Indoor Device is put inside the building. The most common indoor cameras are Dome (Ceiling) Camera and Standard Box Camera.
Outdoor Device is put not in the building and confronted with outdoor weather. Most of Outdoor CCTV is equipped with a ouert shell to protect the it against rain, dust, and extreme temperatures. The most common type of outdoor camera is Round CCTV. This type of camera has a waterproof ouert shell and usually equipped with Infra-Red Led. Besides Round CCTV, the standard box camera with additional housing is also often used as the outdoor camera.
CCTV Cameras desire a minimum brightness to capture the video properly. The level of sensitivity must fit the brightness level in the room where the CCTV is found. The minimum brightness required by a camera means minimum LUX. CCTV can be differentiated into two groups based on their minimum LUX, which are Day Security and Day-Night Security.
Day Security Camera is used to monitor room that has sufficient brightness (above 0. 5 LUX)
Day-Night Security camera is used to monitor room that has low brightness (below 0. 5 LUX)
A control mechanism on the CCTV camera allows the user to modify the camera’s angle and focus. Based on the control mechanism, a CCTV Camera can be divided into power-driven and fixed device.
Power-driven Device has built-in motor to overpower the angle of view and focus remotely. It provides several kinds of cameras such as zoom camera and speed-dome camera
Fixed Device has fixed angle and focus that must be set personally during installation.
Another important aspect when choosing a CCTV camera is video resolution. Video resolution is declared as Number of Television Lines (TVL). CCTV with bigger number of TVL has higher video resolution. A higher resolution CCTV will produce sharper image. However, a high-resolution camera also requires high-resolution monitor to be able to display captured images. Based on the video resolution, CCTV cameras can be divided into three types:
Hi-res CCTV has over 480 TVL resolution
Standard Resolution CCTV has a resolution of 380-480 TVL
Low Resolution CCTV has 380 TVL resolution under
In order to work properly, the CCTV Camera must have a proper design and technology. The design and technology must ensure the functionality of camera in various conditions where it is located. The attributes described above are the most essential attributes for the camera to capture and to send out the video. CCTV buyer can employ the attributes as guidance to understand the classification of the products and find the best one.
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