FAS622en_pH measurement
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4 Applications<br />
Fig. 20:<br />
<strong>pH</strong> <strong>measurement</strong> in a swimming pool<br />
(1) Swimming pool (3) Filter<br />
(2) Raw water (4) Purified water<br />
The <strong>pH</strong> electrode is hardly exposed to any contaminants in the pool water. Electrodes systems with<br />
electrolyte solution (possibly slightly thickened) and ceramic diaphragms have the best <strong>measurement</strong><br />
behavior here. The style used must be designed for an excess pressure, even if this is only<br />
slight, in the measured pipeline. Electrodes with a reference electrolyte gel age very rapidly. As well<br />
as the more frequent outlay for new electrodes, this also results in increased maintenance costs<br />
and poorer control results.<br />
36 4 Applications JUMO, FAS 622, Edition 04.07
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