PH/ORP (Potential of Hydrogen/Oxidation-Reduction Potential) sensor
A sensor and reference solution technology, applied in the field of PH/ORP sensors, can solve problems affecting measurement accuracy, pollution, slow response to temperature changes, etc., to reduce maintenance time and downtime, reduce replacement, and save time.
Active Publication Date: 2015-04-15
SHANGHAI JINJIAN ELECTRONICS TECH CO LTD
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[0007] The purpose of the present invention is to provide a kind of PH / ORP sensor, to solve the problem that existing PH / ORP sensor is slow to the response speed of temperature change and easily polluted by measured solution and influences measurement accuracy
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[0023] The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the preferred embodiments with reference to the drawings. Through the description of specific implementation methods, the technical means and effects of the present invention to achieve the intended purpose can be understood more deeply and specifically, but the attached drawings are only for reference and description, and are not used to explain the present invention limit.
[0024] See figure 1 , which is a structural diagram of a PH / ORP sensor according to an embodiment of the present invention. The PH / ORP sensor includes a housing 1 , a standard electrode 2 , a measuring electrode 3 , a grounded salt bridge 4 and a voltage comparator 5 .
[0025] The material of the housing 1 can be glass or polyphenylene sulfide (PPS). An accommodating space is formed inside the housing 1, and the accommodating space is...
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The invention provides a PH / ORP (Potential of Hydrogen / Oxidation-Reduction Potential) sensor which comprises a housing, a standard electrode, a measuring electrode, a grounding salt bridge and a voltage comparator, wherein an accommodation space is formed in the housing; a solution junction is arranged on the housing; the standard electrode comprises a terminal and a sensing end; the sensing end of the standard electrode is arranged in a first reference solution; the measuring electrode comprises a terminal and a sensing end; the sensing end of the measuring electrode extends out of the housing to be arranged in a solution to be measured; one end of the grounding salt bridge is connected with the solution junction; the voltage comparator comprises a first input end, a second input end, a grounding voltage input end and an output end; the first input end is connected with the terminal of the standard electrode; the second input end is connected with the terminal of the measuring electrode; and the grounding voltage input end is connected with the other end of the grounding salt bridge. The PH / ORP sensor measures an electric potential of the solution to be measured by a difference method, is not influenced by electric potential change of the solution junction and can measure a PH / ORP value of the solution to be measured more accurately and stably.
Description
technical field [0001] The invention relates to an electrochemical sensor, in particular to a PH / ORP sensor. Background technique [0002] ORP (Oxidation-Reduction Potential, Oxidation-Reduction Potential) value and pH value are the important indexes that reflect the state of the solution. The traditional PH / ORP sensor is composed of a measuring electrode and a reference electrode, and measures the electrode potential of the measured solution according to the oxidation-reduction method, and reflects the number of H+ ions in the measured solution, thereby obtaining the pH value of the measured solution . [0003] In this traditional PH / ORP sensor, the measuring electrode and the reference electrode are respectively coated with solid Ag and AgCl on the surface of Ag wire and KCI solution to form a redox system, that is, AgCl+e=Ag + +Cl - . However, there are some problems with this traditional PH / ORP sensor: [0004] 1. When the temperature changes, the reaction balance b...
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IPC IPC(8): G01N27/26
Inventor 甘永康
Owner SHANGHAI JINJIAN ELECTRONICS TECH CO LTD