The XL‑MaxSonar‑EZ4 has the highest noise tolerance and narrowest beam of any of our indoor sensors.
The sensor is designed and calibrated to provide reliable range information to large targets; even in environments with strong acoustic or electrical noise sources.
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 algorithms results in virtually noise free distance readings for most users. This holds true even in the presence of many of the various acoustic or electrical noise sources.
Eliminating Electrical Noise
Unstable readings may indicate an electrical noise issue. Sonar too close to ESC or Motors will have bad readings. User a shielded cable and in addition a power filter.
Here is a power filter that helps eliminate electrical noise being introduced to your MaxSonar sensor.