Instruments for measuring ph

With the vigorous development of the national economy, the path of industrial development at the expense of the environment is unsustainable, and the government has also strengthened environmental protection requirements and monitoring. This involves many parameters that need to be tested, such as acid-base PH, dissolved oxygen, ORP, etc. So the editor will share with you today on PH. So the question is, what is the pH value? How to detect the pH value? 　　 PH measurement is to measure the pH value of the solution by the potentiometric method, so the working method of the pH meter, in addition to measuring the pH value of the solution, also The electromotive force of the battery can be measured. PH is the abbreviation of Pondus hydrogenii in Latin. It is the activity of hydrogen ions in a substance, and the PH value is the negative logarithm of the concentration of hydrogen ions. The main measuring parts of the PH meter are glass electrode and reference electrode. The glass electrode is sensitive to PH, and the potential of the reference electrode is stable. Put the two electrodes of the PH meter into the same solution together to form a galvanic cell, and the potential of this galvanic cell is the algebraic sum of the potential of the glass electrode and the reference electrode. The reference electrode potential of the PH meter is stable, so when the temperature remains stable, the potential change of the galvanic cell composed of the solution and the electrode is only related to the potential of the glass electrode, and the potential of the glass electrode depends on the pH of the solution to be measured Therefore, the pH value of the pH solution can be obtained by measuring the change in potential.　　PH scoring experimental and online 　　traditional: According to the needs of production and life, people have scientifically researched and produced many types of acidity meters: 　　according to the measurement accuracy 　　 can be divided into 0.2 level, 0.1 level, 0.01 level or higher accuracy.　　According to the volume of the instrument, there are pen type (mini), portable, desktop, and online continuous monitoring and measurement. According to the requirements of use, the pen type (mini) and portable pH meter are usually brought to the site for testing and use.　　The accuracy level of the pH meter is selected according to the accuracy required for the user's measurement, and then various shapes of pH meters are selected according to the user's convenience.　　On-line: On-line pH detector is a highly intelligent on-line continuous monitor, which consists of two parts: sensor and secondary meter. It can be equipped with three-composite or two-composite electrodes to meet various applications. Equipped with pure water and ultrapure water electrodes, it can be applied to the pH measurement of water with conductivity less than 3μs/cm (such as chemical feed water, saturated steam, condensed water, etc.). Industrial site: 　　 After you have a basic concept, you can Introduce everyone-PH/ORP tester is one of the intelligent online chemical analysis instruments, which is widely used in PH value or ORP in solutions such as thermal power, chemical fertilizer, metallurgy, environmental protection, pharmaceutical, biochemical, food and tap water. Continuous monitoring of value and temperature. This controller can be used in conjunction with various electrodes. Key parameters and specifications of the acid-base tester: 　　 1. Confirm the use occasion and medium 2. Measure the temperature of the medium 3. Corrosive 4. The specific city of the medium 5. Installation method 6. Corresponding controller output signal and functional application aspects: Generally in medium and large sewage treatment plants, in the 1990s, some foreign imported brands, such as E+H, Mettler, Hash, etc., were mainly used. With the improvement of domestic industrial water products, some domestic manufacturers Also gradually entered this market. For example, Kaidi has done a good job in environmental protection and has one-stop service, which has been recognized by a large number of customers and peers.
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