Patent ID: 8685227

Claim:
A sample fluid testing device for analyzing a sample fluid, comprising a test media tape comprising a tape and a plurality of test media portions, each test media portion containing a sensor field for producing electrical signals when the sample fluid is applied and at least two electrodes, the at least two electrodes being positioned in the sensor field and being electrically connected to at least two contact fields on the test media portion, the sample fluid testing device having at least one roller with a surface, which contains at least one contact zone, the at least one roller being in rolling engagement with the test media tape with its surface in order to successively electrically contact the test media portions via at least one contact field with the at least one contact zone, the at least one contact zone on the at least one roller being electrically connected to a meter for measuring the electrical signals, wherein the at least one contact zone is an electrically conducting annular zone arranged on the circumference of the surface of the roller, wherein the contact zone is flanked by insulating material on the at least one roller.