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ISO 22401:2015 provides a test method to measure spray sedimentation from horizontal boom sprayers using a test bench. The sedimentation measure gives a value for potential spray drift. These measurements can be used to compare different sprayer setups on the same sprayer. ISO 22401:2015 is applicable to mounted, trailed and self-propelled horizontal boom sprayers used in arable crops; and horizontal boom sprayers used for weed control in orchards/vineyards and spray application on horticultural crops. ISO 22401:2015 is intended for booms using a uniform set of spray generators. If intended for spray drift classification of the sprayer, the comparison is limited to nozzle type, spray pressure and boom height.

NOTE Further investigations and tests are on-going to consider other parameters for classification aims (e.g. air assisted system, forward speed, nozzle spacing and orientation).