Both are identical in production rate accuracy and speed. Both require a single static calibration to provide accurate and repeatable weights throughout the range of the scale. Both are designed for wash-down and food-grade applications using all stainless steel and washdown-rated components. The TSC 350 Checkweigher drag-chain style is used for weighing products from eye dropper bottles to bottles of antifreeze. The Sonic 350 is provided with either 2 or 3 belt conveyors mounted to a common framework.