This is a special version OxyGuard Heavy Duty pH/redox Probe. Heavy duty probes are designed for use in applications where standard sealed or gelled electrolyte combination electrodes give unstable measurements or have short lifetimes. It utilizes the tried-and-tested principle of feeding a very small, continuous supply of liquid electrolyte to the reference electrode part of the system. This helps to keep the small ceramic inserts of the reference electrode clean and maintain stable measurements. A special design of combination electrode is used. It is fed with electrolyte from a separate container. The design permits the pressurization of the container and reference electrolyte chamber with compressed air.
The inclusion of a preamplifier directly above the electrode ensures reliable, steady measurements in industrial environments, where the electrical disturbance of pH measurement signals is otherwise often seen.
In this version of the probe the electrode housing is machined from a solid block of PVDF, and it fits a standard ND40 dairy fitting. It is designed to be mounted on pipes that are cleaned at up to 130°C and 2 bar, i.e. that are steam sterilized.