ultrasonic sensor

HC-SR04 Ultrasonic Distance Sensor

The HC-SR04 is a highly popular and reliable non-contact distance measurement module. Using sonar pulses, it calculates the distance to an object with high accuracy and stable readings. Perfect for robotics obstacle avoidance, fluid level detection, and proximity alarms, it interfaces easily with Arduino, Raspberry Pi, and other microcontrollers.

• Operating Voltage: 5V DC
• Detection Range: 2cm to 400cm (4 meters)
• Accuracy: ~3mm resolution
• Measuring Angle: < 15 degrees