Micron AU8500 is a tractor-mounted airblast sprayer developed specifically for the control of pests in tall trees using products formulated for Ultra Low Volume (ULV) application. The machine is intended to be used as a ground-based alternative to aerial application in date palms, tropical fruit trees, forestry etc.
The AU8500 uses a Micronair rotary atomiser to give excellent control of spray droplet size over a wide range of flow rates. Spray droplets are carried upwards into the tree canopy by the air blast from a highly efficient tangential flow fan driven from the Power Take-Off (PTO) shaft of the tractor. The fan is provided with a two-speed gearbox to match the fan speed and air output to the tractor being used. This allows the sprayer to work both with small tractors (32 – 75 HP) and larger types (75 HP and above) for maximum vertical coverage.
The atomiser is mounted at the outlet of a flexible air duct. This is normally directed vertically for optimum coverage of tall trees. However, the angle of the duct can be adjusted for spray application onto smaller trees or bushes or for the control of migrant pests at ground level. The air duct can also be moved to the horizontal position for transport or when driving under obstructions.
The pesticide tank and all pipework and components in contact with the spray liquid are manufactured from materials that are resistant to aggressive solvent-based ULV formulations. The tank has a wide aperture for ease of filling and a drain valve for easy and safe emptying after use. The sprayer incorporates an additional flushing tank to allow the pipework, pump and atomiser to be safely washed out with a nontoxic solvent after use.
The sprayer is operated from a control box inside the tractor cab (where available) for maximum operator safety. The machine incorporates many unique safety features, including an air flow sensor to stop the pesticide pump in the event of the PTO drive being disengaged during operation.
Main frame: Length 1380 mm, width 1100 mm, height 1200 mm (excluding air duct and atomiser)
Air duct and atomiser: Height 1500 mm above top of frame.
|Atomiser Height||3.2 mm above vehicle ground level (on tractor with category 2 linkage at typical operating height)|
|Weight||360 Kg (tanks empty)|
|Mounting||ISO standard category 2 3-point linkage|
|Drive||From tractor PTO shaft operating at 500 – 540 RPM|
|Power Requirement||32 HP max at 540 RPM with low fan speed setting
75 HP max at 540 RPM with high fan speed setting
|Fan Output||18,500 m3/hour at 540 RPM PTO speed with low fan speed setting
22,700 m3/hour at 540 RPM PTO speed with high fan speed setting
|Air Velocity||57 m/sec (205 km/hr) at air outlet at 540 RPM PTO speed with low fan speed setting
80 m/sec (288 km/hr) at air outlet at 540 RPM PTO speed with high fan speed setting
|Vertical Coverage||15 m max at 540 RPM PTO speed with low fan speed setting
20 m max at 540 RPM PTO speed with high fan speed setting
|Spray Droplet Size||Adjustable 50 – 150 μm VMD for typical ULV pesticide formulations|
|Output Rate||Adjustable 0 – 3.0 l/min|
|Output Adjustment||By adjustable valve or interchangeable fixed restrictor orifices|
|Pesticide Tank||100l HDPE construction with 180 mm diameter filling aperture and basket filter|
|Flushing Tank||10l HDPE construction with 100 mm diameter filling aperture and basket filter|
|Electrical Power||12 VDC @ 7 A (spray pump operating)|
|Power Source||From 12 V tractor battery|
|Controls||Mounted in cab of tractor
Switch: Pump on/off
Indicators: Power on/Blower operating/Pump on