TY - MANSCPT DB - Science History Institute DP - Science History Institute M2 - Courtesy of Science History Institute. Rights: In Copyright, D TI - pH ID - 6d56zx17z AU - Beckman Instruments, Inc. AV - Beckman Historical Collection, Box 18, Folder 27 VL - Beckman Historical Collection, Box 18, Folder 27 AN - Beckman Historical Collection, Box 18, Folder 27 UR - https://digital.sciencehistory.org/works/6d56zx17z AB - This mailer, sent to Beckman shareholders, was a reprint from a company publication and explained the significance of the pH meter. 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 - Clip art KW - Hydrogen-ion concentration--Measurement--Instruments KW - Scientific apparatus and instruments KW - Hydrogen-ion concentration KW - Beckman Instruments, Inc. LA - English ER -