Liquid-level detection device

Abstract

A liquid-level detection device for detecting a level of a liquid surface of liquid stored in a container, includes a rotatable body that rotates in accordance with the liquid surface, a fixation body having a main body part fixed to the container and a supporting part projecting from the main body part in an axial direction along a rotation axis of the rotatable body to rotatably support the rotatable body, a pair of magnet parts held by the rotatable body at arrangement positions with the rotation axis therebetween to generate a magnetic flux passing through the supporting part, and a detecting part having an element part disposed inside the supporting part to output a detection result according to a density of a magnetic flux passing through the element part. The rotatable body includes an exposed surface that is located outward of the supporting part and the pair of magnet parts in the axial direction and that is exposed into the container. An erected wall rising up from the exposed surface outward in the axial direction is provided between two projection regions which are obtained by projecting the pair of magnet parts onto the exposed surface outward in the axial direction.