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  ACS712 Module 5A 20A 30A Range Current Detection Board Hall Current Sensor

  $0.70 – $0.84Price range: $0.70 through $0.84
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• 

  DS18B20 Fully Waterproof Temperature Sensor

  $0.42 – $0.84Price range: $0.42 through $0.84
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  This product has multiple variants. The options may be chosen on the product page
• 

  HC-SR501 Human Body Infrared Sensor Module

  $0.70
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  This product has multiple variants. The options may be chosen on the product page
• 

  Intelligent Vehicle Obstacle Avoidance Sensor Module Infrared Coupled Transistor Module Photoelectric Reflective Sensor

  $0.42
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• 

  Line-following Module Intelligent Vehicle Sensor Module

  $0.42
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• 

  MAX30102 MAX30100 Heart Rate and Blood Oxygen Sensor Module

  $0.88 – $1.20Price range: $0.88 through $1.20
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• 

  MFRC-522 RC522 RFID Radio Frequency IC Card Sensor Module

  $0.53 – $1.00Price range: $0.53 through $1.00
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  This product has multiple variants. The options may be chosen on the product page