Ultrasonic Distance Measurement Module - HC-SR04

This is a low cost Ultrasonic Distance Sensor provides a non-contact distance measurement with a fine accuracy of 3mm. The module is capable of measuring distance from obstacles in range of 2 cm to 400 cm or 1 inch to 3 Ft. Unlike IR sensors, the performance of this sensor is no dependent on the sunlight or color of the object.

Specification:
   • Power Supply :+5V DC
   • Working Current: 15mA
   • Effectual Angle: < 15 degree
   • Ranging Distance : 2cm - 400 cm/1 inch - 13ft
   • Resolution : 0.3 cm
   • Measuring Angle: 30 degree
   • Trigger Input Pulse width: 10uS