HC-SR04 is a non-contact distance measurement module, it provides high accuracy and high-resolution ultrasonic proximity detection and ranging in the air. This ultrasonic sensor detects objects from 2 cm to 4.5meters.
- 4 pins
- Power supply: 5V DC
- Static current: 2mA
- Sensor angle: 15 to 35 degrees
- Sensing distance: 0.75in (2cm) to 13ft (4m)
- More precise measurements with ranges up to 6.5ft (2m) away
- Precision: up to 0.12in (0.3cm)