"Inaccurate readings"

Is not consistente and the quality of the holders are garbage.

"MaxBotix - Reputable Sensor Supplier for IoT"

MaxBotix is a reputable supplier of sonar sensors for IoT products. Their products are reliable, affordable and accurate. They withstand harsh outdoor conditions, including extreme heat and cold, precipitation, and wind. We have been using around 50~ units for several years across the US with no issues.