... medium 4CE.UL.RoHS Ultrasonic water level meter for water\liquid level measurementUltrasonic level meter working principle: the probe ... smoke, electromagnetic interference, strong corrosion etc. Widely used in chemical, petroleum, metallurgy, coal, building materials, paper ... spread effective in lots of occasion, Such as: storage tank, materials trough, pool, well, Drains, measuring boxes, granaries ...