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Rights In Copyright Remove constraint Rights: In Copyright Date 1945 to 1949 Remove constraint Date: <span class='from'>1945</span> to <span class='to'>1949</span>

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    • 1940s

    This advertisement for the Model G pH meter highlights the different electrodes that could be used with it. The Model G was Beckman Instruments's first commercial pH meter.

    Arnold Beckman invented his first pH meter in…

    • Bulletin 206
    • circa 1949

    The Pocket Dosimeter was designed to be a portable radiation monitoring system, carried by people to protect themselves against gamma and x-ray exposure.

    • 1949-Mar-17

    The Beckman Instruments IR spectrophotometers began as a request from the Office of Rubber Reserve to Arnold O. Beckman in 1942, asking for an infrared spectrophotometer that they could use to create rubber. Under this…

    • Bulletin 69-B
    • 1949-Dec

    Glass electrodes were used in Beckman pH meters and various other instruments.

    • Dwg. No. 662-000740
    • 1949-Feb-08

    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…

    • circa 1948

    This ad markets several Beckman instruments -- the Model R pH Indicator, the IR Spectrophotometer, and the DU Spectrophotometer -- for use in the oil refining industry.

    • Bulletin 191
    • 1948-Jan

    This questionnaire contains frequently asked questions and common issues with the performance of the IR-2.

    The Beckman Instruments IR spectrophotometers began as a request from the Office of Rubber Reserve to Arnold O.…

    • 1946-Oct-17

    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…

    • 1946-Oct-16

    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…

    • 1946-May-21

    The Beckman Instruments IR spectrophotometers began as a request from the Office of Rubber Reserve to Arnold O. Beckman in 1942, asking for an infrared spectrophotometer that they could use to create rubber. Under this…

    • 1946-May-21

    The Beckman Instruments IR spectrophotometers began as a request from the Office of Rubber Reserve to Arnold O. Beckman in 1942, asking for an infrared spectrophotometer that they could use to create rubber. Under this…

    • 1946-May-20

    The Beckman Instruments IR spectrophotometers began as a request from the Office of Rubber Reserve to Arnold O. Beckman in 1942, asking for an infrared spectrophotometer that they could use to create rubber. Under this…

    • 1946-Apr-26

    In this letter, Beckman requests that a former employee, Robert A. Crane, receive an early discharge from the Navy in light of his father's poor health. Beckman notes that he has an open position for Crane.

    • Bulletin 147-A
    • 1946

    The Beckman Instruments IR spectrophotometers began as a request from the Office of Rubber Reserve to Arnold O. Beckman in 1942, asking for an infrared spectrophotometer that they could use to create rubber. Under this…

    • 1945

    These instructions for phototube replacement describe some of the inner workings of the first model D/DU spectrophotometer made by National Technical Laboratories in 1945. The phototube being replaced in these…

    • 1945-Feb-10

    The Beckman Instruments IR spectrophotometers began as a request from the Office of Rubber Reserve to Arnold O. Beckman in 1942, asking for an infrared spectrophotometer that they could use to create rubber. Under this…

    • 1945-Dec-05

    The DR Spectrophotometer was a basic model DU (an ultraviolet, single beam, quartz-crystal spectrophotometer) with an added recorder. This one-sheet description of the instrument was used in several Beckman Instruments…

    • 1945-Feb-08

    The Beckman Instruments IR spectrophotometers began as a request from the Office of Rubber Reserve to Arnold O. Beckman in 1942, asking for an infrared spectrophotometer that they could use to create rubber. Under this…

    • 1945-Dec-01

    A Nearnst glower is a now-obsolete device that uses a cylindrical rod of heated oxides to deliver infrared radiation in instruments used for spectroscopy.

    The Beckman Instruments IR spectrophotometers began as a…

    • Dwg. No. CD-2000B
    • 1945-Jan-24

    The diagram is annotated in red and blue ink, indicating first and second position.

    Arnold Beckman invented his first pH meter in 1934 at the request of a chemist from the California citrus industry, who needed an…

    • 1945-Nov-12

    Arnold Beckman discusses the status of contract reports, an instrument damaged during shipment, and asks about Spencer Prentiss's post-war plans. He expects to consult with Linus Pauling to decide which instrument to…

    • 1945-Sep-20

    Arnold Beckman notes that he has been busy after the "termination of the war" and discusses bugs in the Model E and complaints about the ruggedness of the oxygen meter.

    Developed from a Linus Pauling design during…

    • 1945-Jul-02

    In this letter, Beckman describes the specifications of the aircraft model oxygen meter (the Model L).

    Developed from a Linus Pauling design during WWII, the technology behind Beckman Instruments’ oxygen analyzers…

    • 1945-Jul-02

    Arnold Beckman expresses concern that the secrecy of the oxygen meter project could adversely affect sales in the anticipated post-war markets.

    Developed from a Linus Pauling design during WWII, the technology behind…