Omodei, B. 2018. Hi-flow unpowered Measured Irrigation controller (HUMIC). AgroTechnology, 4, 26-30.
The Unpowered Measured Irrigation Controller (UMIC) has a limited flow rate because the magnetic valve is quite small. HUMIC uses a much larger magnetic valve. HUMIC uses an Irritrol 2400 Series solenoid valve with 25mm BSP inlet and outlet. The water supply pressure should be between 69 kPa and 1034 kPa (10 – 150 psi). Provided you have a continuous water supply to HUMIC, you can leave your irrigation application unattended for weeks on end.