Dust
Motion and air quality sensors are placed away from windows.
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Hot, dry summers combined with dust blowing in off exposed ground settle into open vents and sensors left near windows, degrading device reliability faster than in more humid cities.
How we solve it: Motion and air quality sensors are placed away from windows, vents, and open verandas, switch plates use sealed housings, and annual service includes a dust and function check so performance doesn't drift over a season.
Most common in: Kamla Nagar, Sikandra, Civil Lines