A device for realizing an online element analysis for a substance that is conveyed past or flows past a measuring station is provided with a device for conveying the substance to be measured, a measuring station with an X-ray source, and an X-ray fluorescence detector with radiation inlet. The whole system allows for a minimally invasive pump implantation and augmentation of flow. A strip of releasable tape is applied to the sheet of material, and variable data is printed on selected portions of the sheet of material and the strip of tape. The SAN-relative extent information may be received over an external network from the primary host system. The securing member contacts with the flexible member.