Looking For A Longer Life pH Sensor?
In order to prevent a pH sensor from being damaged by reference poisoning, it is essential to ensure that the sensor is outfitted with a solid reference junction, which is also referred to as a “Nexus” reference junction. The Nexus reference junction is a patented thermoplastic material that acts as a barrier between the sample electrolyte and the reference electrolyte. This barrier prevents the sample electrolyte from contaminating the reference electrolyte in any way. This is especially critical in applications in which it is known that the sample contains potentially dangerous contaminants, such as heavy metals or organic compounds, that might damage the reference electrode and induce reference poisoning. Examples of such contaminants include:
In addition to this, it is essential to do routine checks and cleanings on pH sensors in order to maintain accurate readings and extend their useful lifespan. During the inspection, it is important to look for any signs of contamination or discoloration on the electrodes, as well as any signs of physical damage to the sensor, such as cracks or breaks in the electrodes. In addition, cracks or breaks in the electrodes should be checked for.
When cleaning the electrodes, a cleaning solution with a pH that is neutral, such as a mild detergent, should be used to remove any dirt or debris that may have built up on the surface of the electrodes. Before putting the sensor to use, it is critical to give it a thorough cleaning with deionized water and then let it dry completely.
In conclusion, it is essential to make certain that a pH sensor is outfitted with a solid reference junction (also known as a Nexus junction), that it undergoes routine inspection and cleaning, and that it is regularly cleaned in order to protect the sensor from reference poisoning and to extend the life of the sensor. Readings of the pH level will be more accurate and reliable as a result of this, and costly downtime caused by sensor failure will be avoided.
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