Lees Off is a nephelometer for tanks easy to be used: by immersing the graduated cable, the turbidity of the must/wine is reported at various levels, and it is possible to decide when to rack or whether to wait. The advantage of this technology is the labour saving in all racking steps, and in the extreme precision and quality of the cleaning level. Practical tests have shown a reduction of 10% of the clarification lees, which results in a higher quantity of clear must/wine. With Lees Off it is possible to distinguish fine lees from rough lees. The ability to adjust the sensitivity of the reader with a proper adjustment system allows working with any type of liquid.