Cleaning and Maintenance

Figure 10 – Spray the solution onto the walls of the flight tube.

Figure 11 – Drain excess solution from the inside of the sun hat.

Due to the flow of air through the sensor, dust and pollen may accumulate on the walls of the flight tube in the sensor, which will reduce its sensitivity. Therefore, the flight tube should be cleaned every three months, and more often in dusty environments.

To clean: disconnect the power from the sensor and upturn it and rest it on the sun hat as shown in Figure 10. In good light (or using a torch), observe each face of the flight tube while squirting jets of compatible cleaning solution¹ onto each face, to remove the dust.

Tilt and hold the sensor as shown in Figure 11 to drain excess cleaning fluid from the sun hat, and with a clean dry cloth, pat dry the inside of the both hat and inlet funnel. Re-fit the sensor to the trap and apply power. The fan will quickly dry the flight tube and avoid blemishes on it due to slow drying soap bubbles.

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Footnotes

1. Any of the following liquid solutions are recommended, in a spray bottle with an adjustable spray nozzle (adjusted as a jet to remove stubborn dirt):

   • A soapy solution made by adding a teaspoon of washing-up liquid (Fairy, etc.) per 1 litre of clean water.
   • A stated acrylic/plexiglass window cleaning solution such as:
     • Ambiti Acrylic cleaner
     • Nigrin caravan acrylic windscreen cleaner
     • S-Polybond acrylic and plexiglass cleaner
     • etc. following the manufacturer’s instructions in each case.

   ⚠️ DO NOT USE domestic glass or multi-purpose cleaning solutions containing alcohol, ammonia, ketones, aromatics, esters, halogens, or solvents (acetone, benzene, gasoline, carbon tetrachloride, thinners, etc.), or kitchen scouring compounds, which could cause crazing or clouding of the acrylic flight tube. ↩