ADLib Glossary (A)

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Air Induction Nozzles

These spray nozzles are sometimes called bubblejets. They create spray of large droplets containing air. They have rapidly been incorporated in many new commercially available systems due to their ability to significantly reduce spray drift when compared with conventional nozzles. Different designs have different performance characteristics but drift may be reduced by 75% or more.

Drift from conventional nozzles is usually reduced by increasing droplet size. However this also means that less spray is retained by the target. When air is used to increase droplet size research shows that this loss is not as high. However, there is, as yet, no firm field data. The ability of the spray to hold air and so its retention on the target will depend on the properties of the spray liquid. For example formulations containing anti-foaming agents will eliminate air and surfactants may also affect the amount of air held.

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