Optical Spot Sprayer nozzle size and operating pressure calculator
Developed by Bill Gordon Consulting August 2024
Instructions for use: Variables that can be changed by the user include the nozzle fan angle, forward angle (if any), boom height, output (L/ha) and operating speed (pink cells). This will provide a range of operating pressures required to deliver the target rate (L/ha) with different nozzle orifice sizes.

GRDC nozzle selection chart, Updated 2024