The difference between a pH lab sensor and an industrial pH sensor
The pH of an aqueous solution can be determined with the use of the measurement electrode, which is developed for this purpose.
The platinum/hydrogen pH sensor electrode has been used to measure the concentration of hydrogen ions in aqueous solutions since its invention in 1897. In addition to performing this function, it serves as a reference standard for the electrometric measurement of pH. The hydrogen electrode of a pH sensor consists of a platinized platinum plate or rod that is coated with platinum black and passed through a flow of hydrogen gas. A silver wire that has been coated with silver chloride is the reference electrode. The fundamental concept underlying the use of a pH sensor hydrogen electrode is as follows: The atoms on the surface of a metal rod can become ionized when the rod is submerged in an aqueous solution containing its own salt. A silver electrode can get ionized, for instance, when bathed in silver nitrate. The positively charged metal ions on the surface of the rod will be attracted to the negatively charged water molecules, leaving the metal negatively charged. This exchange of charges at the phase boundary between metal and solution generates a potential difference. The potential, also known as the galvanic potential, varies according to the concentration of ions in a solution. Even in modern times, the hydrogen electrode is employed as a reference standard, due in large part to the incredibly exact findings of its tests. However, for a variety of pragmatic reasons, the hydrogen electrode has lost its significance due to the fact that it is difficult and complicated to manipulate. Only the antimony electrode has lasted among all the other metal electrodes. Hydrofluoric acid, which is frequently employed to etch glass, has no effect on antimony. Precision and measuring range is nonetheless significantly constrained. Antimony, a chemical that can cause cancer in humans, must be treated with care.
There are several differences between a lab pH sensor and an industrial pH sensor:
- Accuracy: Lab pH sensors are generally more accurate than industrial pH sensors. Lab pH sensors are designed to provide precise and accurate measurements, while industrial pH sensors may have a larger error margin.
- Range: Lab pH sensors often have a wider range than industrial pH sensors. For example, a lab pH sensor may be able to measure pH values from 0 to 14, while an industrial pH sensor may only have a range of 0 to 12.
- Size: Lab pH sensors are often smaller and more compact than industrial pH sensors. This makes them more suitable for use in small spaces or for portable applications.
- Compatibility: Lab pH sensors are designed to be used in aqueous solutions, while industrial pH sensors may be able to measure pH in more specialized media, such as organic solvents or oils.
- Price: Lab pH sensors are generally more expensive than industrial pH sensors. This is due in part to the higher accuracy and wider range of lab pH sensors.
Overall, the main differences between a lab pH sensor and an industrial pH sensor are accuracy, range, size, compatibility, and price. Lab pH sensors are more accurate and have a wider range, but they are also more expensive and may not be suitable for use.
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