Electrode-type liquid level detection device and electrode-type liquid level detection method

• Main Authors: Kagifuku, Tatsuo, Tsuruta, Satoru, Kohyama, Isao
• Format: Patent
• Language: English
• Published: 09.10.2018
• Subjects: MEASURING; MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL; METERING BY VOLUME; PHYSICS; TESTING

An electrode-type liquid level detection device comprises: an electrode unit in which at least two liquid level measurement electrodes, which are used to detect a liquid level, and a calibration electrode, which is not used to detect the liquid level, are integrated; a record unit that records a pre-use resistance value of each electrode of the electrode unit as initial resistance value; a calculation unit that calculates a resistance value of a to-be-measured object based on the initial resistance value; and a control unit that controls in such a way as to adjust a threshold value for determining whether or not the to-be-measured object exists, based on a change in resistance values of the at least two liquid level measurement electrodes when in use. Therefore, the liquid level can be accurately detected corresponding to deterioration of the instrument.