Protection measures for the bulb of the electrode of the industrial pH meter
Industrial pH meter electrode, also known as pH probe, pH meter sensor, English name pHelectrode or pHsensor, is the part of the pH meter that is in contact with the substance to be measured, and is used to measure the electrode potential.
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A set of industrial online pH measurement system usually consists of four parts: pH sensor, i.e. pH meter electrode, pH meter transmitter, electrode sheath and cable.
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At present, there are three main types of electrodes for industrial pH meters: liquid electrodes, gel electrodes and solid electrodes.
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The main reason for the breakage of the glass bulb of the electrode of the industrial pH meter is impact, extrusion and other external forces. The pressure of the bulb of the industrial pH meter electrode is generally ≤0.6MPa. It is common to use the electrode of the pH meter as a stirrer to stir during measurement. During use, the cleaning, drying, capping and other processes should be careful, otherwise it is easy to use excessive force and cause damage. cause broken. After it is broken, this pH meter electrode is estimated to be unusable, and the pH meter electrode must be re-selected.
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How do we usually protect the electrodes of the pH meter?
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1. Industrial pH meter electrodes should be stored in a dry environment between 10°C and 30°C.
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2. When the temperature is lower than -5°C, the electrode of the pH meter may rupture due to the freezing of the buffer and electrolyte.
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3. Due to transportation reasons, when using a pH meter electrode, it is necessary to observe whether the sensitive membrane bubble is filled with solution. If there are bubbles in the membrane bubble, the membrane bubble must be gently shaken down a few times (like a thermometer) to make the membrane The bubble is filled with solution.
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4. If the industrial pH meter electrode is stored in dry conditions, it must be soaked for 24 hours before use, otherwise it will be difficult to calibrate.
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5. When the electrode cap of the industrial pH meter is not used, the pH meter electrode must be placed in KCL solution, such as 3.0NKCL solution or buffer solution, not in distilled water.
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6. Each pH meter electrode needs to be calibrated before it can be used with the pH meter. For industrial pH meter electrodes, two-point calibration is required, and standard buffer solutions should be used for calibration (pH6.86, pH4.00 or pH9.18 ).
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7. The frequency of measuring or checking the electrodes of the pH meter depends on different application conditions (the degree of dirt in the application, the deposition of chemical substances, etc.).
