Principles
The fitting is made from polycarbonate, UV protected for strength and durability.
The large recess before the entry point allows flies to enter the trap
at 70mm from the window, giving more space for flies to move away from
the entry point.
The grill is to allow a greater volume of scent to exit and allows trapped
flies walking on the window to investigate fresh air without finding the
exit. The grill also allows the airflow to reduce the internal trap temperature
if placed in direct sunlight.
When placing the trap in position place the blade at 90 degrees to the
prevailing wind.
In air movement the blade, 20mm above the window, creates low pressure
or venturi thus drawing the scent form the container.
When using a 10 litre paint pail or similar with a recessed lid, the
rain will top-up water lost through evaporation.
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