How long do the electrodes on a typical pH meter last?
This question is often asked by many users, but it can not be answered by a few simple words. First of all, the national standard (ZBN50003-88) on the electrode "life" of the provisions: "electrode warranty period: from the electrode marked on the date of manufacture, the electrode within one year of the storage period of the unpacking and use, its performance should meet all the requirements of this standard. During the guarantee period, if it is found that the electrode does not work properly due to reasons attributable to the manufacturer, the manufacturer shall be responsible for repairing or returning the electrode for replacement'. It is very clear here, the quality assurance period of the electrode, without the use of the premise, the period of one year, so many people speak in general terms of the life of the electrode is one year, in fact, this is not true. Here in addition to the quality of the electrode itself there is a problem of use and maintenance. First of all, the use of media, the same electrode will be in contact with different media, some media is very clean, such as tap water, some media is strong acid and alkali and even high temperature. The second is the use of time, some are occasional use, some are long-term continuous use. The third is whether the cleaning and maintenance, so there will be a big difference, generally speaking, an electrode if the failure of a very short period of time, it is possible that the electrode model selection is not right or the user maintenance is not appropriate, this situation is not responsible for the manufacturer of the refund. Of course, if the electrode has been used, but the appearance is still very good, and there is no trace of bad use, it may be the electrode quality reasons, the manufacturer will generally be responsible for the refund. As for some electrodes called long life electrodes, in fact, there are some problems. The general use of electrodes for half a year to a year, the use of poor conditions of industrial pH electrodes may be even shorter.
