Coal dust
We mount motion and air quality sensors clear of open windows and yard-facing vents.
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Coal dust from mining and allied industrial activity in and around Dhanbad settles into open switches, vents, and exposed sensors far faster than in most Indian cities, shortening the working life of anything mounted in the open.
How we solve it: We mount motion and air quality sensors clear of open windows and yard-facing vents, use sealed switch plates, and build a dust cleaning pass into annual service so hardware life is set at installation rather than left to chance.
Most common in: Hirapur, Bank More, Saraidhela