DFRobot Gravity URM09 Analog Ultrasonic Sensor

Connection Diagram of the basic ultrasonic sensor operation - Since it is known that sound travels through air at about 344 m/s (1129 ft/s), you can take the time for the sound wave to return and multiply it by 344 meters (or 1129 feet) to find the total round-trip distance of the sound wave. Round-trip means that the sound wave traveled 2 times the distance to the object before it was detected by the sensor; it includes the ‘trip’ from the sonar sensor to the object AND the ‘trip’ from the object to the ultrasonic sensor (after the sound wave bounced off the object). To find the distance to the object, simply divide the round-trip distance in half. The DFRobot URM09 is an ultrasonic sensor specially designed for fast-ranging and obstacle avoidance applications. Its measuring frequency can reach up to 30 Hz. The sensor adopts built-in temperature compensation and analog output. Meanwhile, it can provide accurate distance measurement within 500 cm. The sensor is compatible with Arduino, Raspberry Pi, or other main-control boards with 3.3V or 5V logic levels. Specifications: 1. Power Supply: 3.3~5.5V DC 2. Operating Current: 20mA 3. Operating Temperature: -10℃～＋70℃ 4. Measurement Range: 2cm～500cm 5. Resolution: 1 cm 6. Accuracy: 1% 7. Frequency: 30 Hz Max 8. Dimension: 47mm × 22 mm/1.85 × 0.87” Useful Link: Product wiki: https://wiki.dfrobot.com/URM09_Ultrasonic_Sensor_(Gravity_Analog)_SKU_SEN0307 Product Dimension Diagram: https://raw.githubusercontent.com/Frances9/SEN0307/master/800px-SEN0307_Size.png Package Includes: 1 x URM09 Ultrasonic Sensor (Gravity Analog) 1 x PH2.0-3P Connector