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.

1. Use for any size irrigation application with any size solenoid valve
2. The water in the terracotta bowl is protected from algae, mosquitoes and other pests
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 volume of water discharged by the control dripper during the irrigation event (between 360 ml 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 irrigation frequency increases accordingly (the irrigation frequency is proportional to the net evaporation rate)
12. When it rains, water enters the terracotta bowl via the terracotta saucer and delays the start of the next irrigation
13. A timer is not required
14. If you are using the same drippers throughout the irrigation application including the control dripper, the water usage is independent of the pressure (the pressure can be as low as 5 kPa)
15. You can irrigate directly from a rainwater tank without using a pump
16. A light sensor provides the option of irrigating at night time only
17. Uses much less water without affecting the yield
18. Simple and low tech, therefore fewer things can go wrong
19. Provided you have a continuous water supply, you can leave your irrigation application unattended for weeks on end

The Measured Irrigation Valve Controller is available online at the Measured Irrigation Shop.

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