Vorrichtung und Verfahren zur Vermessung kleiner Fl?ssigkeitsmengen und/oder deren Bewegung

An attachment is discosed for retaining a section of a repair panel within an opening defined by a portion of a hollow wall of the type constructed of modern day panels such as drywall, plasterboard, gypsumboard, and the like. The attachment comprises a body member with means on one side thereof to grip a marginal portion of the wallboard adjacent an opening configured to receive a replacement panel correspondingly configured and dimensioned to the opening. Panel support means in the form of a support seat is provided on the opposite side of the body member and configured and dimensioned such that when an attachment is secured along at least two opposed marginal portions of the wallboard adjacent the opening, the panel support means extends inwardly of the opening to support the replacement panel in nestled relation therewithin. In the preferred embodiment two attachments are positioned in adjacent relation along two opposed marginal portions of the wallboard opening. The invention relates to a unique method of repairing such hollow walls utilizing the unique attachment of the invention.