Unpowered Measured Irrigation Controller

It is recommended that you watch the YouTube video Unpowered Measured Irrigation Controller

Unpowered Measured Irrigation Controller showing the adjustable float and the adjustable control dripper 


It is assumed that the smallholder is using drip irrigation (either pressurised or gravity feed) on a garden or a small plot of land. Using the Unpowered Measured Irrigation Controller, you can upgrade your drip irrigation system so that all your plants are irrigated automatically. You can leave your garden unattended for weeks. This will allow you to become involved in other activities away from the garden; for example, travelling to the market to sell your produce.

The Unpowered Measured Irrigation Controller does not need any electricity. Furthermore, it is a smart controller because the water usage is controlled by the prevailing weather conditions. In fact, the water usage (litres per week for example) is directly proportional to the net evaporation rate (that is, evaporation minus rainfall).


You can adjust the water usage by adjusting the control dripper. You can adjust the irrigation frequency by adjusting the float.

  • Can be used for pressures ranging from 10 kPa to 800 kPa.

  • The maximum flow rate is 1350 L/h at 800 kPa.

  • Can be used for sprinkler irrigation.

  • Can be used with pressure compensating or non pressure compensating drippers.

In September 2019, UMIC Unpowered Measured Irrigation Controller was accepted by the Expert Panel for the
Smart Approved WaterMark.

Adjust the water usage (litres per week) by adjusting the control dripper

Adjust the irrigation frequency by adjusting the float

Cylindrical float and seven float rings are provided

The Unpowered Measured Irrigation Controller can be purchased online from the Measured Irrigation Shop.