Which steps are used to calibrate a handheld sprayer?

• A. Mark off 1,000 sq ft area; Record the time it takes to spray the area; Spray into container for that same recorded time; Measure liquid in container
• B. Mark off 50 sq ft; Spray for 5 seconds; Weigh spray amount
• C. Mark off 2,000 sq ft; Measure wind
• D. Mark off 500 sq ft; Spray until container empty

Answer: (A)

Calibrating a handheld sprayer is about knowing the actual spray output so you can apply the label rate accurately. A common and reliable method is to mark off a known area, record how long it takes to spray that area, spray into a container for the same amount of time, and then measure the liquid collected. This approach gives you the spray’s volume per unit time, which you can convert to gallons per acre or other units needed to match the label.

This works well because you’re tying a fixed spray duration to a defined area and capturing the output in a container, giving you a repeatable, measurable rate. Other methods that use very small test areas, rely on weight without a controlled time, focus on wind rather than the actual output, or spray until the container is empty don’t provide a consistent, reproducible rate.