According to current market monitoring, the majority of Dongguan’s surveillance systems are influenced by trends seen in Shenzhen and Guangzhou. As of 2013, the existing monitoring infrastructure is broadly divided into two categories: analog and digital systems. Analog surveillance typically includes cameras, coaxial cables, and hard disk recorders, with a BNC video interface and an analog signal format.
When it comes to choosing analog surveillance cameras, the most affordable option is the 420-line camera, which costs over 100 yuan. Higher-end models range from 480 lines up to 700 lines. Within the same line count, there are different chip options, such as SHARP, SONY, and occasionally LG or other brands. The image sensors used are either CCD or CMOS.
In terms of performance, the best analog camera today is the SONY 700-line CCD model, known for its sharp image quality, though it comes at a higher price. The SONY 650-line CCD is slightly less expensive but still delivers good results. In comparison, SHARP cameras of the same line count often have lower overall image quality, although some may perform better depending on specific models. Unfortunately, some vendors mislead customers by labeling low-quality cameras as "HD" just because they claim high lines. It's important to understand that even a 700-line CMOS camera may cost half as much as a CCD version, but the image quality won’t match the clarity of a CCD sensor.
If you're looking for a mid-range option, I recommend the SONY 600-line CCD camera. If you're aiming for high-definition, don't rush to buy a 700-line SONY CCD immediately—consider your actual needs first. Also, decide whether you need infrared capabilities. Infrared technology is now standard, with array infrared lighting offering significantly better night vision than traditional setups. For example, gun-style cameras with array infrared can see up to 20 meters with one light source, and more than 30 meters with two or more. The FS-5100T series (700-line) is a popular choice.
For dome cameras, infrared arrays can provide visibility up to 60–100 meters, greatly enhancing night vision performance. Over the past two years, security in Dongguan has improved, but many companies still lack proper surveillance systems. Most existing cameras are between three to five years old, leading to blurry images and gradual obsolescence. As a result, new installations are limited, but there are numerous replacement and upgrade projects underway.
It's crucial not to blindly choose cameras based on specifications alone. Understanding the differences between analog systems and making informed decisions will help ensure better performance and value. Always consider your specific needs before purchasing.
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