A.S.B.C. Top Reading Pyrex® Brand Glass Hydrometers
High precision A.S.B.C. (American Society of Brewing Chemists) hydrometers used for the determining extract of beer and wort specified and described in Methods of Analysis of the American Society of Brewing Chemists. The top reading hydrometers are accurate to within one scale division. The scale is in percent Plato and is standardized at 20° Celsius. All hydrometers are supplied combined form with thermometer in the body with the range of 0° to 30°C with a temperature correction scale.
Readings are made on hydrometers at the top of the meniscus when overflowing in a clean special PYREX® brand glass cylinder. They check laboratory determinations made with the Boot or Reischauer pycnometer. All instruments and cylinders must be kept clean. We have found chromic-sulfuric acid (Cleaning Solution) most satisfactory for this purpose.
All A.S.B.C. hydrometers are guaranteed to be accurate, with a maximum error not exceeding one smallest division of the hydrometer scale or one-half smallest division of the thermometer scale.
Directions for using these hydrometers are given in Methods of Analysis of the American Society of Brewing Chemists.