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The easiest way is to use a Passive Infra-Red (PIR) sensor, like they use on "movment-sensitive" alarms and outdoor lights.

Check your local electrical supply store - they've been available here in Australia for some years.

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14y ago
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5mo ago

One way to detect occupants in a room is through motion sensors that can detect movement. Another method is to use occupancy sensors that can detect changes in heat or sound levels in the room. These systems can help in adjusting lighting, heating, or cooling to be more energy-efficient based on occupancy.

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Q: How do you detect an occupant in a room to use electricity efficintly?
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