The present invention provides a carrier band which is movable stepwise in its longitudinal direction past an optical measurement device and on its side facing the measurement device carries test strips to be impregnated with a test liquid running transversely to its longitudinal direction, wherein the test strips are fixed on the carrier band at equal distances to one another at least next to the edges of the carrier band. The present invention also provides a device for fixing test strips on to a carrier band.
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