Megasonic Industries Pvt. Ltd. Manufactures Portable Ultrasonic Wall Thickness Gauge. Megasonic Industries Pvt. Ltd. Manufactures Ultrasonic Instruments. The Portable Ultrasonic Wall Thickness Gauge is used for Testing of Pipelines, Coils and Tubes, Pressure Vessels, Reactors, Gas Cylinders, Condensers, Boilers, Distillation Columns, Storage Tanks etc.