Abstract: A housing assembly for a fluid sensor assembly includes a housing having a first and second sensing volumes. A fluid port attached to the housing has a porous membrane covering first and second fluid apertures. The first sensing volume included a vertically-oriented waveguide and is fluidly coupled to an exterior of the housing through the first fluid aperture, where the first aperture port has an area smaller than an area of a cross section of the waveguide. The second sensing volume is coupled to the exterior of the housing through the second fluid aperture, the second fluid aperture having an area larger than a cross section of the second sensing volume. While the first sensing volume and the second sensing volume are both in fluid communication with an exterior of the housing, the fluid port and porous membrane internally isolate the first sensing volume from the second sensing volume.

Abstract: A holding device is attachable to a shopping cart. The holding device includes a base portion attached to a cart handle of the shopping cart and a pair of adjustable slides movably attached with respect to the base portion. The adjustable slides define an interior portion for receiving a mobile device. The holding device includes at least one adjustment device positioned within the base portion and attached to each of the adjustable slides. The at least one adjustment device biases the adjustable slides towards each other so as to support the mobile device between the adjustable slides.

Abstract: A system for providing advertising information to a user includes a holding device attached to a shopping cart. The holding device removably holds a mobile device. The system includes a recognizable indicia supported by the holding device. The recognizable indicia is recognizable by the mobile device. As such, the mobile device can transmit a first set of information related to the recognizable indicia to a server and receive a second set of information from the server in response.

Abstract: A single or double post sign structure that is configured to accommodate the attachment of panels to one or both sides of a vertical upright. The sign panel is provided with keyed indentations that are located at the top and bottom edges of the panel to permit capture and rigid securement of the sign panel by a pair of retaining buttons that are used to anchor the sign panel to the sign post. Each retaining button is provided with protrusions corresponding to the keyed indentations of the sign panel. As a result, when the protrusion of the retaining button is engaged and seated in the keyed indentation of the sign panel, it becomes locked in place so that there is no room for lateral movement or removal of the panel. As a result, vandals or thieves are prevented from laterally sliding the sign panel to improperly remove it.

Abstract: A single or double post sign structure that is configured to accommodate the attachment of panels to one or both sides of a vertical upright. The sign panel is provided with keyed indentations that are located at the top and bottom edges of the panel to permit capture and rigid securement of the sign panel by a pair of retaining buttons that are used to anchor the sign panel to the sign post. Each retaining button is provided with protrusions corresponding to the keyed indentations of the sign panel. As a result, when the protrusion of the retaining button is engaged and seated in the keyed indentation of the sign panel, it becomes locked in place so that there is no room for lateral movement or removal of the panel. As a result, vandals or thieves are prevented from laterally sliding the sign panel to improperly remove it.