The system utilizes phase-shift laser range module to realize high-accuracy laser measurement from multiple points and form laser fence around card reader. As the device is installed a certain distance from self-service equipment, the installation is convenient and enjoys good hiding. There is no need to destory self-service equipment and the installation is so flexible that the device can be installed withine the range from 0.05m to 20m from ATM card reader. In addition, the laser path of the device enjoys large detection range and is difficult to be affected by enviroment and interfered by electromagnet, effectivly avoiding false alarm and omissions of traditional device.

Especially, the system has set the module of internet of things, which can realize real-time monitoring of ATM card slot in all networks and alarm to center in time of all unusual conditions in card slot. Also it can be connected with SMS alarm module of Yuantuo and send SMS alarm to relative staff or SMS alarm platform of public security sector.