pH Electrodes for Lab and Field
The electrodes consist of a measuring electrode and a reference electrode. pH electrodes from Xylem Analytics
are usually combined pH electrodes or combination electrodes, consisting of a glass and reference electrode
built into one unit. The glass membrane of our electrodes is sensitive to hydrogen ions and filled with a buffer
solution. There is a reference electrolyte in the reference electrode. Immersion in a measuring solution causes a
change in voltage - this change in voltage is recorded as a signal (analog or digital) and converted into a pH value.
Glass electrodes consist of three essential components: the glass membrane, the inner buffer and the measuring electrode. While the inner buffer and the measuring electrode can be used universally, the shape and properties of the glass membrane must be selected according to the respective sample type. Important criteria are the consistency, volume and temperature of the sample, which measuring range is expected and the concentration of the ions in the solution to be measured.
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Standard pH Electrodes: