TY - MANSCPT DB - Science History Institute DP - Science History Institute M2 - Courtesy of Science History Institute. Rights: Public Domain Mark 1.0 TI - Beckman Digital pH Meter ID - vt150j93m AU - Beckman Instruments, Inc. DA - 1969/06// YR - 1969 AV - Beckman Historical Collection, Box 111, Folder 54 VL - Beckman Historical Collection, Box 111, Folder 54 AN - Beckman Historical Collection, Box 111, Folder 54 UR - https://digital.sciencehistory.org/works/vt150j93m AB - Arnold Beckman invented his first pH meter in 1934 at the request of a chemist from the California citrus industry, who needed an accurate way to measure the acidity of his product. The resulting instrument kicked off rapid development not only of Beckman Instruments, Inc. but also of the electronic scientific instrument industry. KW - Hydrogen-ion concentration--Measurement--Instruments KW - Scientific apparatus and instruments KW - Hydrogen-ion concentration KW - Beckman Instruments, Inc. LA - English ER -