Industrial composite pH electrode

1.Product Principle ：

Industrial composite pH electrode：It refers to an instrument used to determine the pH value of a solution.A pH meter operates based on the principle of a primary battery. The electromotive force between the two electrodes of the primary battery is determined by Nernst's law, which is related to both the electrode properties and the concentration of hydrogen ions in the solution. There is a corresponding relationship between the electromotive force of the primary battery and the concentration of hydrogen ions, and the negative logarithm of the concentration of hydrogen ions is the pH value.

There is an excess of hydrogen ionsH⁺The solution is acidic. Acid can make hydrogen ions in aqueous solutionsH⁺Free substances. Similarly, ifIf OH - ions are free, then the solution is alkaline. So, give H⁺The value is sufficient to indicate the characteristics of the solution, whether it is acidic or alkaline. In order to avoid using this molecular concentration negative index for calculation, biologist Zerensen（Soernsen suggested in 1909 to replace this inconvenient numerical value with a logarithm and define it as "pH value". Mathematically, pH is defined as the commonly used logarithmic negative value of hydrogen ion concentration. That is, pH=- log [H]⁺]

Currently, water testing in industryIndustrial composite pH electrodeIt is the potential analysis method used:The electrode used in potentiometric analysis is called a primary cell. A primary battery is a system that converts chemical reaction energy into electrical energy. The voltage of this battery is called electromotive force（EMF）。 This electromotive force (EMF) is composed of two half cells, one of which is called the indicator electrode, and its potential is related to a specific ion activity, such as H⁺The other half cell is a reference half cell, commonly referred to as a reference electrode, which is typically in communication with the measuring solution and connected to the measuring instrument（MX-PHYB-01）connectedThus effectively measuring and detecting the acidity and alkalinity in water quality.

2. Application areas:

☛Industrial automation application field

☛Regarding wastewater treatmentWastewater testing

☛Mining and smelting, papermaking, pulp concentration

☛environmental protection industry, desulfurization and denitrification, wastewater evaporation

☛Medical and health applications、Food and beverage processing industry

☛Experimental or testing equipment、waterworks

☛petrochemicalTextile drawing and other industries

3. Product features:

☛The electrode plastic shell adoptsPON materialSuitable for various complex environments

☛cuteHigh temperature of 80 ℃Capable of withstanding strong acid and alkali erosion

☛This electrode is made of low impedance glass film and can be applied to various conditionsPH measurement,

☛Has fast response and heat The characteristic of good stability; Has good reproducibility, is not easily hydrolyzed, and basically eliminates alkali errors

☛The electrode itself adopts cylindrical spherical bubbles, with a large contact area and sensitive area, which accelerates response time and enhances signal stability

☛Glass has strong impact resistance, higher than ordinary electrodes in terms of impact strengthOver 35%

☛Has good waterproof propertiesStrong UV resistance and corrosion resistance

4. Technical specifications:

5. Ordering Guide:

6. Precautions and maintenance of electrodes:

1. The glass electrode socket should be kept dry, and it is strictly prohibited to come into contact with harmful gases such as salt spray or water solution to ensure high input impedance of the instrument.2. There is an appropriate amount of 3.3mol/L KCl solution in the protective cap at the front end of the electrode, and the electrode tip is immersed in it to maintain the activation of the sensitive membrane and the liquid interface.

3. When using the electrode, it is necessary to remove the transparent protective cap on the front and immerse the glass bulb and the liquid contact part into the measured medium. When installing and fixing, please use raw materials to do a good job of waterproof sealing to prevent water from entering the PH electrode and causing a short circuit in the PH electrode cable.

4. New electrodes or electrodes that have been unused for a long time must be soaked in distilled water for several hours (or dechlorinated) before use. Reduce the asymmetric potential of the electrode to achieve stability and lower the internal resistance of the electrode.5. During measurement, the electrode bubbles should be fully immersed in the measured solution.6. Users need to regularly clean the sensitive film in front of the electrode. For electrodes that have been in use for a long time, their glass film may become transparent or adhere to deposits. At this time, they should be washed and washed with water.

7. The electrode should be cleaned when not in use and inserted into a protective cap with saturated solution

8. There should be no bubbles in the solution to avoid disconnecting the measurement circuit.9. PH electrode is a consumable due to the harsh measurement environment. Its normal service life is one year, and improper maintenance can shorten it

10、Storage of pH glass electrode:Short term: StorageIn a buffer solution with pH=4; Long term: stored in a buffer solution with pH=7.