Ultrasonic Vs. Radar Level Sensors
Radar level sensors are better than ultrasonic sensors in foamy, dusty applications, but a poorly-designed radar sensor is always going to perform poorly. Similarly, ultrasonic level sensors are usually cheaper than radar level sensors for easier liquid or clean-air solids level measurement, but a cheap ultrasonic will never be anything better than a cheap ultrasonic. Ultrasonic and radar sensors don't compete with each other, they complement each other. Neither one is a one-size-fits-all level measurement solution.