| 摘要 |
PURPOSE:To obtain a long-life sensor which can measure the specific gravity of the electrolyte of a lead storage battery with good accuracy and has small self- discharge by constituting the sensor of a lead electrode and a lead dioxide electrode consisting of beta-PbO2 without contg. alpha-PbO2 as an active material. CONSTITUTION:An electrode type specific gravity sensor constituted of a lead electrode and an electrode consisting of only the beta-PbO2 without contg. alpha-PbO2 as an active material is used. The self-discharge of the electrode is extremely small as in the case in which the conventional PbO2 electrode contg. alpha-PbO2 is used. The above-mentioned sensor is thus usable in automatic control for charging of a lead storage battery as the specific gravity sensor which withstands longterm use. |
