Measured Irrigation Valve Controller

The irrigation starts automatically after sufficient water has evaporated from the outside of the porous terracotta bowl. The irrigation stops automatically when the control dripper has replaced the evaporated water. The adjustable control dripper is used to adjust the water usage to suit the water requirements of the plants. The adjustable float is used to adjust the frequency of irrigation.

Having set the adjustable control dripper and the adjustable float, the irrigation frequency and the water usage (litres per week for example) are controlled by the prevailing on site evaporation and rainfall. The irrigation frequency and water usage are proportional to the net evaporation rate (evaporation minus rainfall).

  1. Use for any size irrigation application with any size solenoid valve (latching or non-latching)

  2. The water in the terracotta bowl is protected from algae, mosquitoes and thirsty animals

  3. Completely automatic

  4. Smart irrigation  – the irrigation is controlled by the prevailing weather conditions

  5. Use for both gravity feed and pressurised irrigation

  6. Use for both sprinkler and drip irrigation

  7. Use for both pressure compensating drippers and non pressure compensating drippers

  8. You can adjust the water usage (litres per week for example) by adjusting the flow rate of the control dripper

  9. You can adjust the irrigation frequency by adjusting the float to change the volume of water discharged by the control dripper during the irrigation event (between 360 and 2500 ml)

  10. The water usage is directly proportional to the net evaporation rate (evaporation minus rainfall)

  11. When there is an unexpected heat wave, the water usage and irrigation frequency increase

  12. When it rains, water enters the terracotta pot and delays the start of the next irrigation

  13. A timer is not required

  14. You can irrigate by gravity feed directly from a rainwater tank without using a pump

  15. A light sensor provides the option of irrigating at night time only

  16. Uses much less water without affecting the yield

  17. Simple and low tech, therefore fewer things can go wrong

  18. Provided you have a continuous water supply, you can leave your irrigation application unattended for months on end


Purchase online from the Measured Irrigation Shop.

Detailed instructions are in the Measured Irrigation Valve Controller User Manual.

<  adjustable control


<  control box

<  terracotta pot

<  adjustable float

flaot switch  >

<  inlet valve

light sensor

It is recommended that you watch the YouTube video

Terracotta Irrigation Controller


<  terracotta saucer