Infrared cameras are security cameras that use infrared light. Often this can be seen by the lights that surround the lens in a round shape. This gives the security camera a somewhat larger format, but can film in the dark with the help of this infrared light. Depending on the number and strength of the infrared LEDs, a certain night vision distance is achieved by the infrared camera. There are infrared cameras on the market that have 100 meters of night vision. 
Sensor for day and night:
There is a sensor in the infrared camera that detects the amount of light and turns on the infrared LEDs when there is insufficient light. Some infrared cameras have the option IR cur, which means that the sensor can also be switched off.
Placement infrared camera:
The most important point with infrared cameras is the way and location that they are placed. It is not possible to place the camera behind glass. This is because the infrared light is reflected on the glass and thus only gives a white image. Objects close to the lens have the same effect. The infrared camera must therefore hang in a free space.
Wireless and wired infrared cameras:
As with all security cameras, there are wired and wireless variants. It is also important here for wireless cameras that the distance between the receiver and the camera cannot be too large without interference. Wired gives a better picture, but when this is not possible a Wireless digital infrared camera can be a good choice.
View a full overview of Infrared cameras here
Infrared cameras with invisible IR LEDs:
Since the beginning of this year there are also infrared cameras for sale where the infrared LEDs are not visible to the human eye. Especially when it is important to catch a perpetrator and the infrared camera should not stand out, these cameras are a good option:
View all here: Security camera sets