Gravity: URM09 Analog Ultrasonic Sensor

An ultrasonic sensor uses sound waves to measure the distance to an object. It sends out a sound wave at a set frequency and waits for it to bounce back. Knowing that sound travels through air at about 344 m/s (1129 ft/s), you can calculate the round - trip distance by multiplying the return time by 344 meters (or 1129 feet). Just divide this round - trip distance by two to get the actual distance to the object. The DFRobot URM09 is designed for fast ranging and obstacle avoidance. With a measuring frequency of up to 30Hz, it offers built - in temperature compensation and analog output. It can accurately measure distances within 500cm. Compatible with Arduino, Raspberry Pi, and other 3.3V or 5V logic - level main - control boards. Specification: Power Supply: 3.3 - 5.5V DC; Operating Current: 20mA; Operating Temperature: - 10℃ - +70℃; Measurement Range: 2cm - 500cm; Resolution: 1cm; Accuracy: 1%; Frequency: Max 30Hz; Dimension: 47mm × 22 mm/1.85× 0.87”. Documents: Product wiki.

Using the DFRobot URM09 ultrasonic sensor is easy. First, connect it to a compatible main - control board like Arduino or Raspberry Pi. Make sure the power supply is within the 3.3 - 5.5V DC range. Once connected, the sensor will start measuring distances automatically. When in use, keep in mind that the operating temperature should be between - 10℃ and +70℃. Don't expose it to extreme temperatures. Also, ensure that the object you're measuring is within the 2cm - 500cm range. For maintenance, keep the sensor clean. You can use a soft, dry cloth to wipe it. If you notice any issues with the measurement accuracy, check the connections and make sure the power supply is stable. Refer to the product wiki for more detailed information if needed.