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Used PS400 PPG Sensor

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Replacement sensor and cable for original J+J I-330 P-401 Heart Rate/BVP module.

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Photoplethysmography(PPG) is the process of applying a light source and light sensor to an appendage, such as a finger or a toe, and measuring the light that is reflected by the skin. At each contraction of the heart, blood is forced through the peripheral vessels producing engorgement of the vessels under the light source, there by modifying the amount of light reflected to the photo sensor. Since vasomotor activity is controlled by th sympathetic Nervous System (SNS), the Blood Volume Pulse (BVP) measurements can display changes in sympathetic arousal. An increase in BVP amplitude indicates decreased sympathetic arousal and greater blood flow to the peripheral vessels.