If you are sourcing a ultrasonic ranging module , the HC-SR04 is good choose . Its stable performance and high ranging accuracy make it a popular module in electronic market .Compared to the Shap IR ranging module , HC-SR04 is more inexpensive than it . But it has the same ranging accuracy and longer ranging distance.

Specifications

• Power supply: 5V DC
• Quiescent current: <2mA
• Effectual angle: <15°
• Ranging distance: 2cm – 500 cm
• Resolution: 1 cm
• Ultrasonic Frequency: 40k Hz
• Operation Level Digital 5V
• Power Supply 5V
• Board Size 2.0x4.3x1.5 cm
• Weight 15.00g
• Version 1.0