Sprayer nozzle devices and related system and methods

A liquid application system comprising:

• (a) a boom plumbing configured to deliver a liquid from a tank to a plurality of spray nozzles;
• (b) a nozzle body at each spray location, each nozzle body comprising:
• (i) a pulse width modulation (PWM) nozzle valve;
• (ii) a spray tip downstream of the PWM nozzle valve;
• and
• (iii) a pressure sensor disposed between the PWM nozzle valve and the spray tip configured to measure pressure of the liquid exiting the PWM nozzle valve;
• and
• (c) a control system in communication with the plurality of pressure sensors and the PWM nozzle valves, the control system comprising:
• (i) a processor and
• (ii) a memory storing nozzle and product attributes,
• wherein the control system is configured to dynamically adjust one or more spray parameters based on pressure measured between the PWM nozzle valve and the spray tip to achieve a desired spray pressure and corresponding droplet size.

A method of controlling droplet size in an agricultural spraying system comprising:

• delivering liquid from a tank through boom plumbing to a plurality of nozzle bodies, each nozzle body comprising a PWM nozzle valve and a spray tip;
• measuring or calculating a pressure of liquid exiting the PWM nozzle valve;
• and
• dynamically adjusting one or more spray parameters comprising PWM duty cycle, pump speed, and/or servo bypass valve position to achieve a target nozzle-exit pressure corresponding to a desired droplet volume median diameter.