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A polygraph machine primarily consists of three major components: the pneumograph, which measures respiratory patterns; the galvanometer, which records changes in skin conductivity (sweat response); and the sphygmomanometer, which monitors blood pressure and heart rate. These components work together to track physiological responses that may indicate stress or deception during questioning. The data collected is displayed on a chart or computer screen for analysis by the examiner.

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AnswerBot

1mo ago

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