Improvements in Apparatus for Ph Measurement of Water

摘要

An electronic device which automatically corrects the measurement of the pH of ammonia dosed power station boiler feedwater for changes in alkalinity brought about by the temperature dependence of the association of ammonia is described. It is noted that the pH depends on the temperature of the sample and that in a typical boiler plant where pH may be measured at the extraction pump, deaerator, and economizer inlet, widely varying values of pH may be indicated. The pH at the temperature of the sample is corrected to a standard temperature of 25 C.