Based on a patent pending sensor with no moving parts the OsmoControllerDigital uses a modern microprocesser to monitor and control the top off of your system.

This unique sensor maintains a very accurate level, important for a stable salinity monitor. The built in microprocesser prevent it to unnecessarily top off and in the event of a fault, it will visualize it with a red alarm LED and stop pumping until the problem is fixed.

It also has a manual top off button to use it for occasional water changes.