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| pH measurement in chlor-alkali processes is vital for process control. But elevated temperatures and the presence of chlorine and high salt concentrations make stable and reliable pH measurement with conventional pH sensors a constant challenge. |
| Further, the conditions mean pH sensor lifetime is usually short; therefore, costs in terms of sensor maintenance and replacement are high. |
| This white paper considers the problems of pH measurement in the chlor-alkali process and looks at the InPro 4850i, a chlor-alkali pH sensor designed specifically to tolerate the harsh production process. This dual-membrane sensor uses the process brine itself as a reference and is immune to measurement problems. In addition, digital transmission from the sensor to the connected transmitter provides exceptional signal stability. |
Unlike conventional pH sensors, the InPro 4850i Chlor-Alkali pH Sensor has no diaphragm, making it immune to chlorine and other oxidizing agents that can lead to failure in other pH electrodes.
The sensor outputs a low impedance digital signal, which is not only more precise than an analog signal, it is completely unaffected by moisture and electrical interference and is therefore 100% stable.
The InPro 4850i Chlor-Alkali pH Sensor combines a pNa reference system, advanced glass technology, and digital signal to provide incomparable measurement reliability, long-term stability, extended calibration intervals, plus the flexibility to position the transmitter away from the sensor.
.png/_jcr_content/renditions/cq5dam.web.100.100.webp "Transmitters")
.png/_jcr_content/renditions/cq5dam.web.1280.1280.png "In-Line pH Probe / ORP (Redox) Probe")
