Patent ID: 8820158
Filing Date: 2014-09-02
Classification: G01D,G01F

Abstract:
1. A liquid level detecting device comprising: a resistor plate having a plurality of conductive segments each having an outer top portion and two outer exterior end portions; a float that vertically moves in accordance with a displacement of a liquid level of a liquid to be measured; a float arm that has one end to which the float is attached and the other end which is rotatably supported so as to be rotated in association with a vertical movement of the float; and a contact point that slides on the plurality of conductive segments in association with a rotation of the float arm in accordance with the liquid level of the liquid, wherein each of the plurality of conductive segments is formed of a first metallic material and a second metallic material; wherein the first metallic material has silver (Ag) and palladium (Pd) and the second metallic material has gold (Au) as a main component; and wherein a part which is to be brought into contact with the contact point in each of the plurality of conductive segments is formed of the second metallic material, wherein the outer top portion is formed of the second metallic material and the two outer exterior end portions are formed of the first metallic material.