What device would you typically use to measure spray application rate?

The flow meter is the device commonly used to measure spray application rate because it quantifies the amount of liquid herbicide being dispensed during application. By accurately recording the flow rate, applicators can calculate how much product is being applied over a specific area, ensuring that the application adheres to label recommendations and achieves effective control of target weeds.

Using a flow meter allows for real-time adjustments to maintain the desired application rate despite changes in speed or pressure during the spraying process. This is critical in achieving uniformity and efficacy in herbicide applications as variations can lead to under- or over-application.

In contrast, while a speedometer measures vehicle speed, it does not provide direct information on the rate of liquid being applied. A thermometer measures temperature, which is important for understanding the environment but irrelevant for measuring application rates. Similarly, a pressure gauge indicates the pressure at which the spray system is operating but does not directly correlate to the volume of material dispensed over time. Thus, the flow meter is essential for ensuring precision in herbicide application.