What maintenance is required for the SI-111SS?

The window in the Apogee infrared sensor is inset and protected, but it can become partially blocked in three ways:

  1. Spiders can make a nest in the entrance. Campbell Scientific recommends using a cotton swab to apply a spider repellent around the entrance to the aperture. Do not apply the repellent, however, to the sensor window itself.
  2. Calcium deposits can accumulate on the window if irrigation water sprays up on the head. These deposits typically leave a thin white film on the surface, which can be removed with a diluted acid, such as vinegar. Calcium deposits cannot be removed with solvents such as alcohol or acetone.
  3. In windy environments, dust and dirt can be deposited in the aperture. The aperture can be cleaned with deionized water, rubbing alcohol, or in extreme cases, acetone.

Clean the inner threads and sensor window using a cotton swab dipped in the appropriate solvent. For additional cleaning information, see the Maintenance section of the instruction manual.

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