How long can the electrodes of a typical pH meter last?
This question is often asked by many users, but it is not something that can be answered in just a few words. Firstly, introduce the provisions of the national standard (ZBN50003-88) on the "lifespan" of electrodes: "The warranty period of electrodes: from the manufacturing date marked on the electrode, when unpacked and used within one year of storage, its performance should meet all the requirements of this standard. During the warranty period, if the electrode cannot work properly due to the manufacturer's reasons, the manufacturer should be responsible for repair or replacement." This is very clear. The warranty period of electrodes is based on the premise that they have not been used, with a period of one year. Therefore, many people generally say that the lifespan of electrodes is one year, which is actually incorrect. In addition to the quality of the electrode itself, there is also a problem of use and maintenance. Firstly, the use of media is necessary. The same electrode will come into contact with different media. Some media are very clean, such as tap water, while others are strong acids, strong alkalis, or even high temperatures** It is the usage time, some are used occasionally, some are used continuously for a long time. The third issue is whether to clean and maintain it, so there will be significant differences. Generally speaking, if an electrode fails in a short period of time, it may be due to incorrect electrode model selection or improper maintenance by the user. In this case, the manufacturer is not responsible for refunds and compensation. Of course, if the electrode has been used but still looks good without any signs of use, it may be due to the quality of the electrode, and the manufacturer is generally responsible for refunding and compensating. As for some electrodes that claim to have a long lifespan, there are actually some issues. The general usage time of electrodes is six months to one year, and industrial pH electrodes with poor usage conditions may have a shorter usage time.
