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    Dr. Arnold O. Beckman (1900-2004), pictured here with a DU Spectrophotometer, invented the first commercially successful electric pH meter in 1934. Thus began a long career manufacturing scientific and medical…

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    The production room at the Helipot Division of Beckman Instruments, Inc., where mostly women employees assemble potentiometers, dials, and other small devices.

  1. Portrait of Ezekiel [Ezéchiel] Weintraub, a Russian-born chemist who was the first to produce 99 percent pure boron in 1909.

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    Instructions and a visual diagram for hooking up 3 #5540 batteries to power a Beckman Model G pH Meter. These three smaller batteries could replace a single, large 22.5 volt battery. This diagram was written on Bob…

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    Advertisement about using various models of Beckman pH meters for monitoring water quality in industrial settings.

    Arnold Beckman invented his first pH meter in 1934 at the request of a chemist from the California…

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    The system this unidentified woman is using includes a Model 152 Mircrofuge.

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    This instrument measures the nitrogen oxides (NOx) produced during the combustion of gasoline. Once in the atmosphere, they can contribute to the formation of smog and air pollution.

    Beckman Instruments, Inc. became…

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    Developed from a Linus Pauling design during WWII, the technology behind Beckman Instruments’ oxygen analyzers ended up doing such diverse jobs as monitoring astronauts’ respiration, maintaining packaged food safety,…

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    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…

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    It is unclear from context and the existing description of this image if this is an automobile exhaust analyzer system or an automatic data handling and analysis system.

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    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…

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    Developed from a Linus Pauling design during WWII, the technology behind Beckman Instruments’ oxygen analyzers ended up doing such diverse jobs as monitoring astronauts’ respiration, maintaining packaged food safety,…

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    This instrument was designed to be incorporated into electroencephalograph units and included an impedance meter. An electroencephalogram test detects electrical impulses in the brain via electrodes attached to the…

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    Based on the Coulter principle, the Beckman Blood Cell Counter quantifies and sizes particles suspended in a fluid, like blood cells. The instrument works by drawing liquid containing the particles through a channel,…

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    A microtitrator is an instrument designed to titrate very small volumes of liquid.

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    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…

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    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…

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    First marketed in 1960, the Beckman/Spinco Model 120 Amino Acid Analyzer allowed users to quickly perform amino acid chromatography. This later instrument was likely part of the same line and was designed to read the…

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    A woman in lab coat and laced sneakers uses an amino acid analyzer. The photo captures an unusual angle, high above the woman's left shoulder.

    Although unidentified, this is likely the Beckman/Spinco Model 120 Amino…

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    First marketed in 1960, the Beckman/Spinco Model 120 Amino Acid Analyzer used the Spackman-Stein-Moore technique of amino acid chromatography.