The video surveillance and security are one of the specialties of GCTL. On our website and our physical store located in Dhaka, our clients can find all kinds of CCTV security systems. There is a wide variety of on the market surveillance CCTV cameras and accessories to design systems security fully customized adaptable to any circumstance. That is why at GCTL we have created a guide that helps our clients to know in detail the most important aspects of the sector, specifically:

HOW TO CHOOSE THE RIGHT CCTV CAMERA AND SURVEILLANCE SECURITY

It is increasingly necessary to have a surveillance and security camera both in homes and in companies. In addition to helping to identify thieves in the event of a theft, it works very well as a deterrent. In any case, it is necessary to study in detail what are the needs that we want to cover by asking ourselves some questions prior to acquiring a CCTV Camera surveillance device. For example:

• Do I need surveillance inside a space, outside, or both?
• How far away will the object I need to record be?
• What resolution do we want for the image, and its amplitude (zoom)?
• Do we want a specific design or is it indifferent to us?
• Do we need it to pick up sounds too?
• How do we want to control them?

Depending on the use that we are going to give the camera, we will have to choose one model or another, taking into account the characteristics we need. In any case, the objective is to guarantee safety and make the investment made profitable. Having carried out this first step, we can differentiate between different types of surveillance and security cameras, distinguishing between three main families: analog CC camera, HDCVI CCTV Camera or digital IP CCTV cameras (with an Internet connection).

ANALOG CCTV CAMERA:

Analog surveillance and security cameras installed by wiring. In addition to it connect to a power source, they must also connect to a video recorder that collects the images and allows them to viewing on a monitor. This same video recorder converts the analog signal to digital, connecting to a router. Within analog cameras there is an important variety of modalities, we highlight the following:

BOX conventional surveillance cameras:

These cameras carry all the electronics, the lens, and the power supply in the camera body. The advantage that the desired objective can install adjusting it to specific needs, depending on the distance at which the object we want to visualize that locate. In addition, it is suitable for both indoor and outdoor spaces. In the second case it is necessary to protect its structure with a suitable casing.

Bullet CCTV camera:  

It can be used both indoors and outdoors. Its design is one of the best known for its aesthetics and you can choose between several colors. Most cameras of this type incorporate an infrared illumination system adapted to Night Vision CCTV Camera.

Dome CCTV camera: 

If there is something that differentiates this type of camera from the rest, it is its characteristic design in the shape of a half sphere. Due to their shape, they are designed to be installed on the ceiling, so that they blend into the environment of any space without attracting attention. Within this model we can find some variations, for example specific devices for interior or exterior and / or resistant to actions of vandalism.

PTZ CCTV camera mobile dome surveillance:

Its design and installation method allow you to control a space from all angles. Their technical characteristics allow these

360 degrees CCTV camera:

s to rotate horizontally and 180 vertically, so that the plane just below can also be observed. On the other hand, it allows you to pan from left to right, tilt from top to bottom, and zoom in and out of a plane. As in the model, it bullets CCTV camerahas specific models for interior and exterior and some have an infrared lighting system indicated for night vision.

Mini CCTV cameras:

They are small surveillance camera. In many cases they are using for spying. They can be indoor or outdoor, with a built-in microphone and / or waterproof. Within this type of camera, we can find other even smaller ones, the ultra-miniatures.

Wireless CCTV cameras surveillance: These cameras are indicated for places where the installation cannot be carried out with wiring in any way, for example campsites, hunting farms ... For their operation, they must have a transmitter coupled to the camera and a receiver that connects directly to the television., a monitor, a computer or the video recorder. There are cases in which there is no power supply either, a situation that can solve with solar panels or other alternatives. In any case, it is a type of camera that we recommend only for exceptional situations.

HDCVI CCTV CAMARAS (High-Definition Composite Video Interface)

These cameras are analog, although with differences from the conventional ones mentioned above. The main difference - and advantage - with the analog devices explained above is the resolution of the image. If analog cameras offer a maximum of 1000 TVL -which would correspond approximately to 0.4 megapixels-, one with an HDVCI CCTV Camera system offers a minimum resolution of 1 megapixel, more than half only in its lowest version.

Another advantage is that universal CCTV Camera Video recorders are currently on the market that are compatible with both conventional analog cameras and those that use HDVCI technology. Therefore, the handicap that could pose a limitation due to camera-recorder compatibility.

With similar characteristics although technically somewhat different, we can also find HDSDI and HDTVI CCTV cameras.

IP CCTV CAMERAS (DIGITAL):

It is a type of surveillance camera with an IP connection, that is, to the Internet. The camera make to connect to a router, so that what is happening you can control all time from a computer, a monitor or a smartphone. To get the most out of this type of cameras, it is highly recommended to purchase an NVR Network Video recorder, so that the camera not only shows us what is happening in a certain place, but it will be recorded on the hard disk integrated in the recorder.

Within digital cameras we can choose between several models, in which aspects such as image resolution, recording method, whether or not it has infrared, sounds and alarms, and so on, will vary. On the other hand, there are other types of surveillance and security cameras with very specific uses. They are the perfect solution to give concrete solutions to each situation.

a)       Thermal cameras: This type of surveillance camera works differently. Your system creates images from the heat emitted by people, animals or things. It for areas or spaces of complete darkness. These types of cameras usually have analog and IP connection.

b)      People Counting Inspection cameras: They are designed to control places that are difficult to access, for example pipes and sewers. Within this category we find submersible or specific anti-vandalism and anti-explosion cameras, among others.