Abstract: Disclosed is an air cleaner a body, a cover detachably provided on a front side of the body and configured to have an intake hole to take air into the body, a filter case disposed between the body and the cover such that a filter is attached to the filter case, and an authorized filter sensor attached to the filter and the filter case to sense whether the filter is authorized, wherein the authorized filter sensor includes a transmitting member attached to a lower end portion of the filter or included in the lower end portion of the filter and a detecting member provided on the filter case to sense the transmitting member and detect a variable electrical property.

Abstract: Disclosed is an air cleaner a body, a cover detachably provided on a front side of the body and configured to have an intake hole to take air into the body, a filter case disposed between the body and the cover such that a filter is attached to the filter case, and an authorized filter sensor attached to the filter and the filter case to sense whether the filter is authorized, wherein the authorized filter sensor includes a transmitting member attached to a lower end portion of the filter or included in the lower end portion of the filter and a detecting member provided on the filter case to sense the transmitting member and detect a variable electrical property.