The Sugarequip PI Tumbler is used to determine the Preparation index of shredded cane. The percentage of cane plant cells which have been ruptured by the cane preparation equipment is used as a measure of the effectiveness of the preparation equipment of cane knives and or cane shredder. The test is carried out on a sample of cane after the shredder. The percentage of brix in the ruptured cells to total brix in the cane is known as the preparation index. The higher to 100% one can obtain, the higher the efficiency of the mill preparation for sucrose extraction.