Patent ID: 9395328
Filing Date: 2016-07-19
CPC Classification: G01N

Claim Text:
1. An apparatus for detecting sodium in a liquid comprising: a sodium detecting unit configured to detect concentration of sodium in a liquid using a plurality of voltages; a temperature-signal processing unit configured to measure a temperature of the sodium detecting unit; a low-noise amplifying unit configured to amplify the difference between the plurality of voltages detected by the sodium detecting unit with low noise; a filtering and amplifying unit configured to amplify the low-noise signal output from the low-noise amplifying unit up to a required level and filters the amplified low-noise signal; and a signal-processing and controlling unit configured to calculate the concentration of the sodium using the low-noise signal received from the filtering and amplifying unit and corrects the calculated concentration of the sodium on the basis of the temperature measured by the temperature-signal processing unit by referring to electrode voltages for a standard solution measured at several temperatures and stored in a memory.