Infrared cameras are dark at night.

There are basically the following possibilities for this problem:

First, there is something wrong with the camera itself, which is divided into two points.

1, does not sense the infrared light source, and pastes the infrared filter incorrectly. According to what you said, but this possibility is not great, for reference only.

2. infrared lamp didn't start. It is also divided into lamp damage and photosensitive resistance start-up failure.

The difference is to see if infrared lamp is open at night. There is a light indicating that there is something wrong with the filter, and there is no light indicating that the light is not started.

Second, the power supply is insufficient.

Normal during the day, nothing at night (black video signal). It should be that the infrared lamp needs a lot of current to start, and the line loss and power consumption will reduce the voltage, resulting in the camera and the infrared lamp inside not working normally.

Generally, there are few 70 meters in the market, but most of them are 30 meters, 50 meters, 80 meters and 100 meters.

Generally, the market price of 50m is 300-600 yuan depends on the camera chip.

The general market price of 80 meters is 500- 100 yuan, depending on the camera chip.

If you don't understand anything, you can call me for advice. Zhangsheng 4006868608