B05B 12/124

Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material {to be} discharged, of ambient medium or of target {; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means} responsive to conditions of ambient medium or target, e.g. humidity, temperature {position or movement of the target relative to the spray apparatus responsive to distance between spray apparatus and target}