The security of any enterprise and private property cannot be imagined without the use of CCTV cameras. However, the choice of a particular model is somewhat difficult for those who have not previously encountered them. You can buy CCTV cameras at the lowest cost, with more practicality.
It is necessary
- - catalog or store selling surveillance cameras;
- - technical description of cameras.
Instructions
Step 1
Determine the required design of a video camera The choice of a video surveillance camera by type depends on the location of its installation and the purpose of viewing: - mini-cameras are designed for covert surveillance and are mounted on the wall. The box of such cameras can be cylindrical or rectangular; - dome cameras are installed on the ceiling and have an interesting design; - outdoor cameras have a protective casing with a heating system, a sun visor and infrared illumination for night time; - standard cameras are usually made in a cylindrical shape and are suitable for mounting on any surface. Almost any lens with the required viewing angle can be used for them; - Modular cameras are produced without a housing with one board and small lenses. They can be inserted into a thermal casing or a box; - adjustable cameras have a swivel mechanism for a better view of the object and a specific area.
Step 2
Choose from color or monochrome cameras Black and white video cameras are cheaper and more sensitive to see better at night than color cameras. However, color cameras can be equipped with many functions. For example, the day / night function allows you to switch to monochrome mode in the dark. In some cases, the color of the image is required for better object recognition. However, color models are more expensive.
Step 3
Pay attention to specifications - Resolution: measured in TV lines. Vertically, all models have a resolution equal to 625 TVL, and horizontally, it ranges from 380 to 600 TVL. The higher this indicator, the more small details can be seen; - sensitivity: its choice depends on the level of illumination of the observed area. Sensitivity is measured in lux (lx). The higher the setting, the brighter the subject will be illuminated during the daytime. The smaller it is, the better the visibility at night. For example, for areas with poor lighting (outdoors), it is worth giving preference to cameras with a sensitivity of 0.01 to 0.05 lux.
