ALMOCN 6PCS HC-SR04 Ultrasonic Sensor Distance Module Measuring Ranging Sensor for Arduino

Technical Parameters: Power Supply :5V DC  Quiescent Current : <2mA  Effectual Angle: <15°  Ranging Distance : 2cm - 500 cm  Trigger Input Pulse width: 10uS Resolution : 0.3 cm  Dimensions: 1.3 x 0.4 x 0.1 inch/3.03 x 1 x 0.25 cm (L*W*H) Mode of Connection: VCC/ trig(T)/ Echo(R)/ GND (VCC supply 5V, and GND is ground wire. TRIG is trigger control signal input, ECHO is echo signal output.)  Module Working Principle: -1. Pull the Trig pin to high level for more than 10us impulse, the module start ranging. -2. The module automatically sends eight 40KHz square wave to detect whether a signal is returned. -3. Finished ranging, If you find an object in front, Echo pin will be high level, and based on the different distance, it will take the different duration of high level. -4. Calculated the distance, the distance = (high level time * sound velocity (340M/S) / 2. Package includes: 6* HC-SR04 Ultrasonic Distance Sensor