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公开(公告)号：US4018661A
公开(公告)日：1977-04-19
申请号：US610278
申请日：1975-09-04
IPC分类号： G01N27/28 , G01N27/416 , G01N27/46
CPC分类号： G01N27/283
摘要： There is disclosed an instrument probe assembly that is suited for the measurement of a variable of a flowing liquid stream which contains suspension of debris and foreign matter. The instrument probe assembly includes a housing having a closed end for immersion in the liquid with a concavity in the closed lower end having sidewalls inclined at an acute angle to the longitudinal axis of the housing and at least one through opening in a sidewall of the concavity to receive at least one probe member which is sensitive to a variable of the liquid with its exposed surface generally continuous with the sidewall. The probe member assembly is employed with a pH meter that includes a sensing electrode in the concavity with the reference electrode mounted within an annular chamber of the housing and having the reference electrolyte in contact with the liquid through a porous disk which is mounted in the through opening in the sidewall of the concavity. The resultant assembly is ideally suited for measurements of a flowing liquid stream that contains debris and foreign suspended matter, e.g., process streams of a sewage plant, since the concavity of the probe assembly introduces a circulatory motion to the liquid within the concavity and this motion prevents the accumulation of debris and foreign matter about the surfaces of the sensing electrode and reference junction of the cell.
摘要翻译： 公开了一种仪器探针组件，其适用于测量包含碎屑和异物悬浮液的流动液体流的变量。 仪器探针组件包括壳体，该壳体具有用于浸入液体中的封闭端，在封闭的下端具有凹部，其具有与壳体的纵向轴线倾斜成锐角的侧壁和凹部的侧壁中的至少一个通孔 以容纳至少一个对液体变量敏感的探针构件，其暴露表面通常与侧壁连续。 探针构件组件与pH计一起使用，所述pH计包括在凹部中的感测电极，参考电极安装在壳体的环形室中，并且具有通过多孔盘与液体接触的参考电解质，该多孔盘安装在通孔 在凹槽的侧壁上开口。 所得到的组件非常适合于测量含有碎屑和外来悬浮物质（例如污水处理厂的工艺流）的流动液体流，因为探针组件的凹陷引入凹槽内的液体的循环运动，并且该运动 防止细胞周围的感测电极表面和参考结的表面积聚碎屑和异物。
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公开(公告)号：US3986932A
公开(公告)日：1976-10-19
申请号：US560630
申请日：1975-03-21
CPC分类号： C12M41/34 , C02F3/006 , C02F3/34 , G01N33/1806 , Y02W10/15 , Y10S435/813
摘要： Aerobic fermentation processes which involve mixing an aqueous microbial food medium with a microbial culture are controlled by continuously withdrawing a sample of the microorganism culture and a sample of a mixture of the aqueous food medium and the microorganism culture, directly and continuously measuring a respiration rate of both samples and proportionating the amount of the microorganism culture admixed with the food medium in response to the respiration rate measured to maintain a ratio of the biochemical oxygen demand of the food medium to that of the microorganism culture at a preselected constant value. This control process is preferably used when decomposing wastes such as sewage by aerobic microbial fermentation.
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公开(公告)号：US4036722A
公开(公告)日：1977-07-19
申请号：US606443
申请日：1975-08-21
CPC分类号： G01N27/28 , C10M2203/00 , C10M2205/173 , C10M2207/022 , C10M2207/023 , C10M2207/026 , C10M2207/123 , C10M2207/129 , C10M2207/22 , C10M2207/281 , C10M2207/282 , C10M2207/283 , C10M2207/284 , C10M2207/285 , C10M2207/286 , C10M2207/288 , C10M2207/289 , C10M2207/34 , C10M2207/40 , C10M2207/402 , C10M2207/404 , C10M2209/00 , C10M2209/02 , C10M2209/10 , C10M2209/101 , C10M2209/103 , C10M2209/104 , C10M2209/105 , C10M2209/106 , C10M2209/109 , C10M2209/12 , C10M2211/044 , C10M2211/06 , C10M2215/08 , C10M2215/082 , C10M2215/202 , C10M2215/28 , C10M2219/082 , C10M2221/02 , C10N2260/04
摘要： There is disclosed a flow through cell assembly that is particularly useful for housing of the sensing cathode of a dissolved oxygen cell. The flow through cell assembly supports the cathode of the dissolved oxygen cell adjacent the upper surface of a through passageway receiving flow of the liquid under investigation and includes a transversely positioned second probe that substantially blocks flow through the through passageway and provides an orifice area of restricted dimensions immediately beneath the dissolved oxygen probe. The dissolved oxygen probe is positioned substantially coplanar with the upper surface of the through passageway to avoid the formation of any air or gas pockets in the flow passageway which could cause erroneous indications on the dissolved oxygen probe. This also allows a high flow velocity across the sensor tip which permits lower volumetric flow rates and a proportionally greater sensitivity of continuous respirometer instrument utilizing the flow through cell assemblies.
摘要翻译： 公开了一种通过电池组件的流通，其特别适用于容纳溶解氧气池的感测阴极。 流过细胞组件的流经支撑溶解氧细胞的阴极，邻近待通过的液体流动的通道的上表面，并且包括横向定位的第二探针，其基本上阻挡流过通过通道的流动并提供限制的孔口 溶解氧探头正下方的尺寸。 溶解氧探针与穿通通道的上表面基本上共面定位，以避免在流动通道中形成任何空气或气穴，这可能导致溶解氧探针上的错误指示。 这也允许跨越传感器尖端的高流速，其允许较低的体积流速和使用流过细胞组件的连续呼吸计仪器的比例更高的灵敏度。
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公开(公告)号：US3997419A
公开(公告)日：1976-12-14
申请号：US585030
申请日：1975-06-09
CPC分类号： G01N27/404
摘要： An electrochemical device for sensing the concentration of dissolved oxygen in aqueous liquids is described. The device has a housing with a projecting boss that supports an assembly of the cell cathode and a permeable membrane with a removable retainer means overlying peripheral edges of the membrane and with compressive sealing means to permit facile replacement of the membrane and/or cathode. The cell anode is of expanded form in the shape of a coiled metal wire wrapped about a plurality of spaced posts within the cell chamber. Internally of the chamber is a tubular means which projects above the cathode in juxtaposition to the expanded form anode to provide a well about the cathode which is thereby shielded from accumulation of any precipitate that may form in the electrolyte in the proximity of the anode surfaces. The electrochemical system includes an electrolyte of approximately equal molar concentrations of a potassium halide, preferably iodide, and potassium hydroxide which provides maximum sensitivity and operating life. The preferred electrodes are a silver cathode and lead anode which generate a sufficient potential for accurate measurement of dissolved oxygen in aqueous media. The electrodes are connected in the external circuit to a load resistor and the voltage generated across the resistor is applied to a sensitive galvanometer which is calibrated or standardized to dissolved oxygen concentrations. A temperature compensating circuit can also be provided.
摘要翻译： 描述了用于感测含水液体中溶解氧浓度的电化学装置。 该装置具有壳体，该壳体具有突出的凸台，其支撑电池阴极的组件和可渗透膜，其具有覆盖膜的周边边缘的可移除的保持器装置以及压缩密封装置以允许容易地更换膜和/或阴极。 电池阳极是以围绕电池室内的多个隔开的柱缠绕的螺旋金属丝的形状的膨胀形式。 在室内部是管状装置，其在阴极上方并列扩展形式的阳极以提供围绕阴极的阱，由此可以防止在阳极表面附近在电解质中形成的任何沉淀物的积聚。 电化学系统包括大致相等摩尔浓度的卤化钾，优选碘化物和氢氧化钾的电解质，其提供最大的灵敏度和使用寿命。 优选的电极是银阴极和铅阳极，其产生用于精确测量水性介质中的溶解氧的足够的电位。 电极在外部电路中连接到负载电阻器，并且跨过电阻器产生的电压被施加到敏感电流计，其被校准或标准化为溶解氧浓度。 还可以提供温度补偿电路。
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