... medium 4CE.UL.RoHS Universal ultrasonic level meter for distance measurement Ultrasonic levelmeter working principle: the probe ... launch a bunch of ultrasonic pulse to the object, ultrasound is reflected ... paper making, environmental protection industry and so on. Ultrasonic can spread effective in lots of occasion, Such as ... 3m,5m,7m,10m,15m Universal Ultrasonic level meter\sensor