A motion sensor comprises a touch screen, and a motion indictor proximate to the touch screen, the touch screen displaying: an adjusting bar indicating a threshold at which motion is detected, and a level bar indicating {HEAD ~ an amount} of {TAIL ~ currently measured motion} 
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A motion sensor comprises a touch screen , and a motion indictor proximate to the touch screen , the touch screen displaying : an adjusting bar indicating a threshold at which motion is detected , and a level bar indicating { HEAD ~ an amount } of { TAIL ~ currently measured motion }
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