ph/orp sensor
A sensor and reference fluid technology, applied in the field of PH/ORP sensors, can solve the problems of pollution, slow response to temperature changes, affecting measurement accuracy, etc., to achieve the effect of reducing replacement, saving time, reducing maintenance time and downtime
Active Publication Date: 2017-10-24
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 foregoing 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 the specific embodiments, the technical means and effects adopted by the present invention to achieve the predetermined purpose can be more deeply and specifically understood. However, the accompanying drawings are only used for reference and description, and are not used for 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. This 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 (PHenylenesulfide, PPS). An accommodating space is formed inside the casing 1, and...
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The present invention proposes a PH / ORP sensor, comprising: a housing, a standard electrode, a measuring electrode, a grounded salt bridge and a voltage comparator. The interior of the housing forms an accommodating space, and the housing is provided with a liquid junction. The standard electrode includes terminals and Sensing end, the sensing end of the standard electrode is set in the first reference solution, the measuring electrode includes a terminal and a sensing end, the sensing end of the measuring electrode protrudes from the shell so that it is placed in the solution to be measured, the grounding salt One end of the bridge is connected to the liquid junction, and the voltage comparator includes a first input terminal, a second input terminal, a ground voltage input terminal and an output terminal, the first input terminal is connected to the terminal of the standard electrode, and the second input terminal is connected to the terminal of the measuring electrode. Connect the ground voltage input terminal to the other end of the ground salt bridge. The PH / ORP sensor of the present invention uses a differential method to measure the potential of the solution to be tested, is not affected by the change in the potential of the liquid junction, and can measure the PH / ORP value of the solution to be tested more accurately and stably.
Description
technical field [0001] The present 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 important indicators to reflect the state of the solution. The traditional PH / ORP sensor is composed of a measuring electrode and a reference electrode. The electrode potential of the measured solution is measured according to the oxidation-reduction method, and the number of H+ ions in the measured solution is reflected to obtain 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 the Ag wire to form a redox system with KCI solution, 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 bala...
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IPC IPC(8): G01N27/26
Inventor 甘永康
Owner SHANGHAI JINJIAN ELECTRONICS TECH CO LTD