Are they detecting heat? Or are they detecting something else? Is there a way to move so discreetly that a motion sensor wouldn’t detect your movements?
In: 1
A lot of the times basic ones just use a simple camera. If something has changed between picture 1 and picture 2 then that signifies movement.
Obviously if you wanted something super advanced you could use Lazer beams and detect if something has broken the Lazer signal
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