PH analysis instrument

It’s hard to answer your question – its lifespan varies depending on the place it’s used.

The original poster can conduct a survey on the mean time between failures for the pH analyzer, and then they will know.

One of the Mettler instruments in our factory has been in use for about two years; the electrodes are consumable items, so it’s best to purchase two at once

This post was last edited by denghl on 2010-7-16 21:09. pH transmitters, just like pressure and temperature transmitters, will not fail as long as they are of good quality and the operating conditions are favorable. If sensors (electrodes) are used for no more than 3 months, it is necessary to analyze whether the operating conditions and the sample preprocessing system are appropriate. We use TOLEDO models; some of them have been in use for over 2 years now without any maintenance, and there have been no issues at all – their performance is incredibly impressive. The one that requires the most frequent maintenance is due to the presence of suspended particles, which necessitate regular cleaning; the maintenance cycle is once a month, and the lifespan of the electrodes is more than half a year. Suggestion: Provide the necessary operating conditions when selecting a model, so that the manufacturer can choose the appropriate electrode. Personal experience: 1. For strongly alkaline environments, use alkali-resistant electrodes. Ordinary glass electrodes are not suitable, as glass can be corroded by alkalis. 2. Special electrodes must be used to measure the pH of low-conductivity media. Because ordinary electrodes have a minimum requirement for conductivity. For example, we use it to measure the pH of ultra-pure water; due to its low conductivity, the measurement results are not ideal (point 2 mentioned above was not taken into account during selection). However, by using some less appropriate calibration methods, the electrode has never broken down and is still in good working condition to this day.