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4 Channel Infrared Tracing ModuleFeatures-Detection range: 1mm to 60 CM adjustable, the closer the performance more stable, white reflects the farthes..

Heart Rate Monitor Kit with AD8232 ECG sensor module Good QualityFeatures-Designed to extract, amplify, and filter small biopotential signals in the p..

KY-039 Finger Detection Heartbeat Measuring Sensor ModuleFeatures-Use IR LED and an optical transistor to detect pulsation in fingersSmall and Compact..

TCRT5000 IR reflex Tracking Sensor ModuleFeatures:The working voltage: 5VThe output format: digital signal (0 and 1)A fixed bolt hole for easy install..