The HC-SR04 sensor uses ultrasonic sound waves to determine distance to an object, like bats or dolphins do. It offers excellent range, accuracy and stable readings in an easy-to-use package. Its operation is not affected by sunlight or black material like IR rangefinders are (although acoustically soft materials like cloth can be difficult to detect).
- Power Supply :5V DC
- Quiescent Current : <2mA
- Effectual Angle: <15°
- Ranging Distance : 2cm – 500 cm/1″ – 16ft
- Resolution : 0.3 cm
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