Abstract: A capacitive oil sensor assembly includes: a main body; a first conductive pad disposed on, or embedded in, the main body; and a conductive reference pad area, disposed on, or embedded in, the main body. The conductive reference pad area is connected to a ground or reference point. A gap or isolation layer separates the first conductive pad and the conductive reference pad area. The sensor assembly also includes: an electrically conductive layer; a first layer made of an oil-absorbing material, the first layer arranged between the electrically conductive layer and the main body, covering the first conductive pad and the conductive reference pad area; and a processing unit configured to measure a capacitance between the first conductive pad and the conductive reference pad area. A method of detecting oil using a capacitive oil sensor assembly is disclosed.

Abstract: A table-mounted sensor assembly for determining a status of a workspace, desk or table includes: a motion and/or proximity sensor; a wireless transceiver for wireless communication with an external unit, such as a gateway; a processing unit; a local user interface for manually setting a state of the table-mounted sensor assembly; and a battery for powering the motion and/or proximity sensor, the wireless transceiver, the processing unit and the local user interface, wherein the table-mounted sensor assembly comprises at least a dirty state, an occupied state, and a clean state. The processing unit is configured to set the table-mounted sensor assembly in one of the dirty state, occupied state and clean state based on motion and/or proximity sensor data from the motion and/or proximity sensor and user input data from the local user interface to determine the status of the workspace.