Can a FloJack MSR (aka ACR35) be used for scanning NFC tag continuously? YES! We get asked this question a lot so we studied how the FloJack/ACR35 performs while continuously scanning. A situation that often happens when scanning a tag is that it triggers your app, instead of the other way around where your app prompts the user to scan one. With tag triggered apps the NFC reader must maintain the magnetic field (the “F” in Near Field Communications) and wait for a tag to be presented.