H-Select uses 4-head nozzle bodies arrayed in individual or selected boom sections. An autonomous controller manages each section's speed against the spray rate, then switches the nozzle heads on and off rapidly and precisely to achieve consistent spray delivery across the turning boom.
H-SELECT calculates the speed of the sprayer and automatically activates the best combination of nozzles for each boom section.
If you’re making a 50 m radius turn at 20 km/h, the inner end of a 48.5 m boom will slow down to just 10.3 km/h while the outer tip will accelerate to 29.7 km/h.
In other words, the tip-to-tip speed range of 19.4 km/h is almost equal to the forward speed of the sprayer, and the flowSave rate will need to double across the boom.
Precise droplet control also makes H-SELECT an effective drift management system. Because it uses combinations of nozzles to manage the target rate at constant pressure, the droplet size doesn’t change with the rate adjustments.
The operator can set a droplet size and even change it on the move, using the in-cab Run Screen. It means they can adjust their droplet size throughout the day, to manage wind speed, temperature and humidity changes.
Farmers can also use a coarse droplet to spray the paddock perimeter, then change to a finer setting once they’re away from the fence lines.
Pulse Width Modulation works by switching nozzles on and off several times per second. This reduces the amount of fluid leaving the nozzle, which maintains the target Set Rate where the boom is moving slowly.
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