The Krohne OPTISOUND 3030 is a 2- or 4-wire ultrasonic level transmitter for medium-sized process or storage tanks up to 15 m / 49 ft. It is suitable for basic applications with open channels, basins, wastewater tanks and conveyor belts. The OPTISOUND 3030 can also be used for measuring bulk solids in small to medium size tanks or hoppers.