XL-MaxSonar-AE0 MB1300 Ultrasonic Distance Sensor SF_Specialty it includes an LMV324 operational

it includes an LMV324 operational amplifier (op-amp) for processing the audio signals from the microphone

For less reflective objects (like hands) the distance is about 5cm

Unlike sonars that bounce ultrasonic waves

The breakout board version of this sensor has both I2C and SPI interfaces

XL-MaxSonar-AE0 MB1300 Ultrasonic Distance Sensor SF_Specialty it includes an LMV324 operationalThe XL MaxSonar AE0 offers a wide and sensitive beam pattern for indoor use. This makes the XL MaxSonar AE0 an excellent choice wherever wide beam detection, reliable people detection, or reliable small obstacle detection are required. The sensor is small in size, yet the high output acoustic power combined with continuously variable gain, real time background automatic calibration, real time waveform signature analysis, and real time noise rejection