Triple Scale Home Wine and Beer Hydrometer from Almost Off Grid. Made by hydrometer production market-leader Stevenson-Reeves, this easy-to-read triple scale hydrometer is made of glass. It is 23 cm long and has 3 scales for measurement. The coloured bands on the hydrometer indicate where to start and finish wines and beers, plus there is an indication for sweet/medium/dry finished wines. The hydrometer comes packed in a strong clear plastic tube along with an instruction leaflet. As well as being used as a storage tube for the hydrometer when not in use, the plastic tube can also be used as a trial jar.