Enamel pH Sensors Suit High-End Hygienic Processes

Burkert's 8201 enamel pH sensors are suitable for use in high-end hygienic processes; for example, in the production of foods and active ingredients where the pH value of liquid mediums is measured. The system has a 'fit-and-forget' design that enables its sensor to stay in process, even during CIP purification. The 8201 provides long service life in these processes and high levels of accuracy, with its ability to measure absolute pH values between pH0 and pH12, at medium temperatures up to 140C and process pressures up to 6 bar.

The 8201 pH sensor is a highly integrated device, operating as a single-rod measuring cell, with the measuring electrode and reference electrode combined in one element. The sensor probe is a stainless-steel tube, which also houses a Pt 1000 for temperature compensation. It is coated with an ion-sensitive enamel layer, providing an extremely smooth surface that prevents media from sticking during measurement, making the sensor very easy to clean.

Unlike many glass probes that have electrolytes that dry out in air, the 8201 sensor can be left dry for extended periods - as long as the user requires - without any drying out or loss of performance. The electrolyte is stored in a separate electrolyte vessel and permanently connected to the electrode via a hose. The pressure of the electrolyte vessel is maintained slightly above process pressure by means of an attached pressure controller.

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