Ebulliometer extended type in chrome-plated brass scale 0-20 Centesimal complete in leather case. This is a very practical, easy to use measuring instrument to determine the alcohol level in wine, precise to 1/10%. The principle of this instrument is based upon the different boiling point of a liquid in different atmospheric pressure. The boiling point decreases when the alcohol level is increasing.There is a download file on how to use an Ebulliometer above.The principle of this instrument is based upon the different boiling point of a liquid in different atmospheric pressure. The boiling point decreases when the alcohol level increases. *Note - we also have spare parts for both Chrome and brass models, please call or email our friendly staff to assist you with further inquiries*