Ultrasonic level transmitters used in dry bulk solids level monitoring are starting to be eclipsed. Radar technology is now so good that it can get a signal and level or distance off of very unreflective media such as polypropylene pellets. Compared to ultrasonics, radar is often more reliable, easier to use, and has lower maintenance requirements. Check out this video from Swanson Flo highlighting the Schneider Electric LR64 and LR65 radar level transmitters.
For more information, call Swanson Flo now at 800-288-7926 or visit their website at https://swansonflo.com.