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    Turbidimeter
    91.
    发明授权
    Turbidimeter 有权

    公开(公告)号：US10823672B2

    公开(公告)日：2020-11-03

    申请号：US16690555

    申请日：2019-11-21

    Applicant: Hach Company

    Inventor： Richard Edward Leggett ,  Wayne Boris Perdue ,  Andreas Mitreiter

    IPC: G01N21/51 ,  G01N21/47

    Abstract: Various turbidimeters are described that can detect light directly in a substantially circular, e.g., encompassing, manner such that an increased amount of scattered light from a sample vial may be detected by a light detector, e.g., a photodiode or photodiode array. In an embodiment, a substantially circular photodiode array is provided to directly detect scattered light in an arc about the sample vial. In other embodiments, light guides are provided in an arc element that guides light to a detector or detectors. Other aspects are described and claimed.

    Single-beam radar level and velocity sensing
    92.
    发明授权
    Single-beam radar level and velocity sensing 有权

    公开(公告)号：US10571315B2

    公开(公告)日：2020-02-25

    申请号：US15711483

    申请日：2017-09-21

    Applicant: Hach Company

    Inventor： David L. Rick

    IPC: G01S13/58 ,  G01F1/00 ,  G01S17/58

    Abstract: An embodiment provides a method for measuring velocity and depth of fluid flow in a channel, including: transmitting, using a transmitter, directed energy comprising a single energy beam slant-wise toward a surface of a fluid in a fluid channel producing a plurality of reflections, wherein the transmitting comprises modulating a frequency associated with the single energy beam; detecting, at a receiver, received signals from the plurality of reflections; and determining, based upon differences between parameters of the transmitted single energy beam and parameters of the received signals, the velocity of the fluid and the depth of the fluid. Other embodiments are described and claimed.

    Turbidimeter
    94.
    发明授权
    Turbidimeter 有权

    公开(公告)号：US10281393B2

    公开(公告)日：2019-05-07

    申请号：US15512408

    申请日：2015-09-18

    Applicant: Hach Company

    Inventor： Richard Edward Leggett ,  Wayne Boris Perdue ,  Andreas Mitreiter

    IPC: G01N21/51 ,  G01N21/47

    Abstract: Various turbidimeters are described that can detect light directly in a substantially circular, e.g., encompassing, manner such that an increased amount of scattered light from a sample vial may be detected by a light detector, e.g., a photodiode or photodiode array. In an embodiment, a substantially circular photodiode array is provided to directly detect scattered light in an arc about the sample vial. In other embodiments, light guides are provided in an arc element that guides light to a detector or detectors. Other aspects are described and claimed.

    Chlorine analytical test element and a stabilized N, N-diethyl-p-phenylenediamine solution
    97.
    发明授权
    Chlorine analytical test element and a stabilized N, N-diethyl-p-phenylenediamine solution 有权
    氯分析试验元素和稳定的N，N-二乙基对苯二胺溶液

    公开(公告)号：US09545781B2

    公开(公告)日：2017-01-17

    申请号：US14310512

    申请日：2014-06-20

    Applicant: HACH COMPANY

    Inventor： Ibrahim A. Ismail ,  Matthew Hertel ,  Teresa Lynn Swanson

    IPC: B32B38/00 ,  G01N31/22

    CPC classification number: B32B38/164 ,  G01N31/224 ,  Y10T436/193333

    Abstract: A test element (10) used to determine concentration levels of free and total chlorine in a water sample comprises a test pad (12) adhered to a substrate (14), wherein the test pad (12) is impregnated with a stabilized DPD solution. The test pad (12) is color responsive to different concentration levels of chlorine in the water and compared to a color chart to determine the level of free chlorine and/or total chlorine in the water. The stabilized DPD solution may include N,N-diethyl-p-phenylenediamine oxalate salt, a polymeric anhydride such as a methyl-vinyl anhydride and an organo-sulfate such as dimethylsulfone.

    Abstract translation: 用于确定水样品中游离和总氯浓度水平的测试元件（10）包括粘附到基底（14）的测试垫（12），其中用稳定的DPD溶液浸渍测试垫（12）。 测试垫（12）对水中氯的不同浓度水平进行颜色响应，并与比色图进行比较，以确定水中游离氯和/或总氯的含量。 稳定的DPD溶液可以包括N，N-二乙基 - 对苯二胺草酸盐，聚合酐如甲基 - 乙烯基酐和有机硫酸酯如二甲基砜。

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