The ins and outs of pulse-width modulation sprayers
2019
- University of Arkansas
Project Media
Pesticide applications are complex processes with many variables potentially
impacting the biological outcome of the application. Additionally, greater regulatory
demands have increased the need for more precise application methods.
Pulse-width modulation (PWM) sprayers provide an opportunity to increase precision
through variable rate flow control by pulsing electronically actuated solenoid valves at each nozzle. The solenoid valves are pulsed a designated amount of times per second (standard = 10). The percentage of time each valve is open (duty cycle) determines the flow rate.