Title: pH meter, Model G
Date: 1957
Original Format: photograph: print
Description: Serial no. 143220 (in lid; lid is detached). Manufacturer: Beckman Instuments, Inc., 1957. Similar to ST-BE-18. Original case is formica with lid (detached, no hinges or handle); lower door missing. With original instructions inside lid, dated January 1957.
Collection: Scientific Instruments
Caltech Archives ID: ST-BE-20
