Vinoferm Acidometer. A high precison acid testing kit which includes a calibrated 20 ml glass test tube w/ stand. This allowes for direct readings in grams tartaric/liter or ppm. The kit includes bleu indicator (reagent) solution and litmus papers to help determain the end point. An easy to use and accurate acid testing kit. We prefer this kit over our item ti27 acid test kit. Suitable for both red and white wines. This kit can be used to determine the free so2 content. You must purchase ti28b iodic solution to perform the so2 test (sold seperately).