Accurately check the flow rate of individual sprayer nozzles in just seconds with this calibrator! By obtaining the true flow rate, you can avoid costly over or under application of chemicals and also identify worn spray nozzle tips that need to be replaced. To use, simply hold the calibrator under the nozzle at a slight angle. Allow the calibrator to fill until the display shows the flow rate. Readings are obtained in 10 seconds or less per tip and are shown in GPM, oz./min., or Liter/min. The display holds the reading for 90 seconds. The waterproof calibrator is constructed of break-resistant plastic and stainless steel, features a clear design for easy cleaning, and has no moving parts.