Ph and Redox probes
pH and Redox (ORP) probes are essential instruments for measuring and controlling pH and oxidation-reduction potential in liquids, playing a crucial role in various industrial and scientific applications.
Check out the range of pH and Redox sensors here
Its main features are detailed below:
Working Principle:
- pH probes: These probes measure the concentration of hydrogen ions in a solution, providing an accurate indication of the acidity or alkalinity of the medium. They consist of a pH-sensitive glass electrode and a reference electrode that allows differential measurement.
- Redox (ORP) probes: They measure the oxidation-reduction potential of a solution, indicating its capacity to accept or donate electrons. These probes usually use noble metal electrodes such as platinum or gold, which react with the chemical species present in the solution.
Sensor Types:
- Electrochemical: They use redox reactions to generate a signal proportional to the pH or redox potential present.
- Optical: They use fluorescence principles to measure pH, offering advantages such as rapid response times and greater long-term stability.
Construction Materials:
Manufactured with materials resistant to corrosion and adverse conditions, such as special glass for pH electrodes and noble metals such as platinum or gold for Redox electrodes, guaranteeing durability and reliability in demanding environments.
Measuring Ranges:
- pH: They generally range from 0 to 14, with an accuracy of ±0.01 pH.
- Redox (ORP): Ranges vary by model and application, but are typically between -200 mV and +2000 mV, with an accuracy of ±10 mV.
Maintenance and Calibration:
Periodic calibration is essential to maintain measurement accuracy. Maintenance varies depending on the sensor type; optical models typically require less maintenance than electrochemical ones.
In summary, pH and ORP probes are essential tools for monitoring and controlling processes that require accurate pH and ORP measurements, such as in water treatment, chemical and pharmaceutical processes.
