Hydro-Link (German Version) is a browser-based user interface that can be run from a PC or directly from the datalogger. Currently this is only used on the CR300-series dataloggers. Normally, when Hydro-Link is loaded onto and run directly from a CR300-series datalogger, the datalogger would have the Wi-Fi option or a CR310 with Ethernet. When running Hydro-Link from the datalogger, smartphones and tablets can also be used to display the interface.