Scale-Tron has completed a major upgrade of its SiloWeigh II Pro system for controlling inventory in silos and liquid tanks. The touch-screen based system warns of low levels in vessels to prevent running out of material and halts in production, while potential overfills are identified before spillage can occur. A further bonus is measurement of every fill amount as a check on delivery shortages and fraud. A trend graph for each vessel is zoomable to any date and time, with all data stored on a USB memory stick for transfer to a computer run- ning Excel.