Sensor Degradation
Systematic failure in chemical sensors involves the slow migration or loss of the gellified reference medium from the probe housing into the surrounding solution. During continuous monitoring of dye baths, gel electrolyte leaching alters the electrical potential of the reference electrode, which distorts the pH readings. It occurs because high temperature, agitation, and chemical additives break down the gel structure.
This loss of gel leaves the junction dry or partially empty, requiring frequent sensor replacement to avoid dyeing errors.
Dyeing Impact
Acidity control in reactive dyeing is highly sensitive to pH variations of even a decimal point. When gel electrolyte leaching shifts the measured value, the automatic dosing system adds the wrong amount of alkali. This error leads to unlevel dyeing, patchiness, and rejected fabric batches.
Preventative Action
Using pressurized reference electrodes or liquid-filled probes reduces the risk of sensor drift. Technicians must calibrate and check the electrolyte level daily in continuous processing plants. This maintenance keeps the measurement system reliable and prevents costly dye house failures.
Environmental Influence
High salinity and elevated temperatures in the dye liquor accelerate the degradation of polymer gelling agents. The speed of gel electrolyte leaching increases in the presence of strong detergents and sequestering agents. These conditions demand the selection of robust, industrial-grade sensors.
