How long do pH meter electrodes last?
This question is often asked by many users, but it cannot be answered in a few words. First, the national standard (ZBN50003-88) stipulates the "life" of electrodes: "Guarantee period of electrodes: Starting from the manufacturing date marked on the electrode, when unpacked and used within the storage period of one year, its performance should comply with this specification. All requirements of the standard. During the warranty period, if it is found that the electrode cannot work properly due to the manufacturer's fault, the manufacturer shall be responsible for repairing or returning it. It is very clear here that the quality guarantee period of the electrode shall not be used until it has been used. The premise is that the term is one year, so many people generally say that the life of the electrode is one year. In fact, this is wrong. In addition to the quality of the electrode itself, there is also a problem of use and maintenance. The first is to use the medium, the same electrode It will come into contact with different media. Some media are very clean, such as tap water, and some media are strong acid, alkali or even high temperature. One is the usage time, some are used occasionally, and some are used continuously for a long time. The third is whether it is cleaned and maintained, so there is There will be a big difference. Generally speaking, if an electrode fails in a short period of time, it may be that the electrode model is incorrectly selected or the user does not maintain it properly. In this case, the manufacturer is not responsible for refunds. Of course, if the electrode still looks good despite being used, and there are no traces of use, it may be due to the quality of the electrode, and the manufacturer will generally be responsible for refunds. As for some electrodes that are claimed to be long-life electrodes, there are actually some problems. .The general use time of electrodes is half a year to one year, and the time of industrial PH electrodes with poor use conditions may be shorter.
