A sensor selection tool from Rosemount Analytical, a unit of Emerson Process Management, Austin, allows users to find the Emerson sensor that meets their specific pH/ORP measurement requirements. The tool allows users to search by use from three main categories. They include general purpose, usually for water or wastewater applications; tough processes, for optimizing sensor life where there are high temperatures or aggressive chemicals; or specialty. Typical applications that fall in the specialty category include those with:
- High purity requirements of less than 5 µS/cm.
- Non-glass sensors.
- Steam-in-place temperatures up to 284°F (140°C).
- Hydrofluoric acid being present.
- Poisoning resistance, especially in sulfides.