Large Ultrasonic (Sonar) Sensor with Horn and UART Output

This impressive-looking horn is actually an ultrasonic sensor, ready for panel mount use. Inside is a module that uses high-frequency signals to determine distance to a surface, and the horn helps guide the waveform so it can reach farther without spreading too wide. It's elegant looking and is more durable than the 'raw' ultrasonics we sell a lot of, so it would do well in a garage, robot, or installation where you want a durable dust and weather-resistant design. It has a range of 28 cm to 750 cm with a read resolution of 1mm (precision isn't specified, but it's probably about 5-10 mm). As you get to the longer distances, it's important to take into account the spread of the cone, which is about 40 degrees. We weren't able to get a reading of 750cm, but we did reach 600 cm (in our small apartment).