Abstract: An improved fragrance vibrating and nebulizing module comprises a holding unit which is installed on an opening of a container, so that a plurality of retainers can retain a wick in place. Two engaging portions formed on an outer periphery of the holding unit can cooperate with guide grooves formed on a central annular portion of a vibrating and nebulizing base and be rotationally connected to be in place. After a receiving space of a top retaining unit is mounted with a resilient element and a vibrating plate, the resilient element and the vibrating plate are retained in place by a resilient retainer. Through holes of the top retaining unit are connected with resilient tenons on the vibrating and nebulizing base. While in use, the vibrating and nebulizing module can draw up a fragrance via the wick, so that the fragrance is nebulized and dispersed in contact with outside air.

Abstract: A drop sensing device for monitoring intravenous (IV) fluid flow is provided. The device comprises a U-shaped clip mountable on a drip chamber of an IV infusion set. The clip has a light source provided at one side for emitting radiation and a hollow cylinder provided in a through hole on the side opposite the light source. The cylinder includes an aperture of a diameter smaller than an average diameter of fluid drops passing the drip chamber, and an optical sensor mounted on a rear end of the cylinder opposite the aperture, so as to substantially enhance sensitivity of light ray receiving.