Pomona

Mark off a known distance (200–500 ft works well). Drive at your normal spraying speed and use the stopwatch below to time the run.

How do you want to measure your output?

Tank refill method

Run the sprayer at operating pressure for a timed period — parked or moving — then measure how much water it takes to top back up. Simple and reliable for airblast sprayers.

Nozzle catch method

Catch all nozzles on one side into a container for exactly 1 minute at operating pressure. Measure total ounces. Great for verifying individual nozzle output.

Catch all nozzles into buckets for exactly 60 seconds at operating pressure and your normal field speed. Measure total output in ounces, then divide by 128 for GPM.