General device needs to have holes in the top cover before installing the reader head. In most cases, in order to quickly respond to the market, various types of barrier turnstiles are required to be in warehouse. In order to solve this problem, modularized structure design is used in the device. We integrate the reader, conversion board and top cover into a modular reader panel. The disassembly and installation of the reader head only need to pull the plug, without drilling holes in the top cover and purchasing new conversion board. Just prepare one model of SBTL8200 and multiple models reader panel in warehouse, that you can meet various market demands.