**3 or 5 Units** HY-SRF05 Precision Ultrasonic Range Sensor Module for Arduino

Sensor, Ultrasonic Distance, high precision HY-SRF05 Choose between 3-unit or 5-unit pack!   Ultrasonic sensors overcome many of the weaknesses of IR sensors - they provide distance measurement regardless of color and lighting of obstacles.   They also provide lower minimum distances and wider angles of detection to guarantee that obstacles are not missed by a narrow sensor beam.   This model is an upgrade from the lower precision HC-SR04. This has 5 pins and can be used in 1-pin trigger/echo or 2-pin.   Use these formulas to calculate distance:   Distance (in cm) = (elapsed time * (340 m/s)) / 50   Distance (in inches) = ((elapsed time * (340 m/s)) / 50) * 0.393701       Specifications   Trigger Pin Format: 10 uS digital pulse   Sound Frequency: 40 kHz   Echo Pin Output: 0-Vcc   Echo Pin Format: output is DIGITAL and directly proportional with range. See our conversion formula above.   Measurement Range: 2cm to ~4.5m   Measurement Resolution: 0.3cm   Measurement Angle: up to 15 deg   Measurement Rate: 40 Hz   Supply Voltage: 4.5V to 5.5V   Supply Current: 10 to 40mA   Connector: standard 5-pin male connector which can plug directly into breadboards.