The DFD F4 Gate Sensor works with any Valco® or Mactron® system, including the MCP 25, MCP 25MS, MCS, and MCU and installs in minutes onto any folding carton machine. The DFD F4 also operates as a stand-alone unit that can be installed onto a folder gluer with a glue pot. The DFD F4 can interface with UV spray maker, kicker, DT 400 Ejector, machine stop circuit, machine fed circuit, and external devices, such as alarms and beacons.