The main advantage of the Dosatron is that is can operate using a very low water flow. Other venturi type systems require a very high flow which will not work for most drip irrigation systems.
You will know your system unit is working when you hear a slight clicking noise. Because of this clicking noise it is best to place the unit away from your quiet areas. Locate in a utility closet or build an airtight enclosure to contain the clicks.
For detailed information see: Florafelt Drip Irrigation Guide