Flow monitoring, for connecting flow sensors of the FCS and FCI series, IO-Link device with transistor outputs, operating voltage 20.30 VDC, transistor outputs for flow, temperature and error, switching point setting without teaching the flow limits (QuickTeach), LED strip for displaying flow velocity and media temperature, monitoring of the working and display range, sensor-side wire break and short circuit detection, operation optionally in standard IO or IO-Link mode, parameterization via touch button and software-supported via IO-Link