Abstract: A measurement device has at least one sensor for detecting a parameter, a data storage unit, and a power supply for said sensor and data storage unit. In addition to the first sensor, the measurement device has at least one second sensor connected to the power supply and to the data storage unit. The second sensor is provided for detecting a physical quantity acting on the first sensor and is capable of permanently altering the measurement characteristic of the first sensor. An evaluator functions coactively with the second sensor and the data storage unit so that the permanent alteration of the measurement characteristic of the first sensor is recordable as a function of the measurement signal of the second sensor.

Abstract: A measurement device has at least one sensor for detecting a parameter, a data storage unit, and a power supply for said sensor and data storage unit. In addition to the first sensor, the measurement device has at least one second sensor connected to the power supply and to the data storage unit. The second sensor is provided for detecting a physical quantity acting on the first sensor and is capable of permanently altering the measurement characteristic of the first sensor. An evaluator functions coactively with the second sensor and the data storage unit so that the permanent alteration of the measurement characteristic of the first sensor is recordable as a function of the measurement signal of the second sensor.

Abstract: The invention relates to a method for detecting and/or determining the concentration of a ligand contained in a solution to be analyzed, during which a receptor, which can enter into a specific bond with the ligand, is immobilized on a semiconductor chip at a test location. In order to bind the ligand to the receptor, the solution is applied to the test location. A luminescence radiation or a color change is generated according to the binding of the ligand to the receptor. A radiation measurement signal is picked up with the aid of a radiation receiver integrated in the semiconductor chip, whereas the solution and/or an auxiliary liquid that does not contain the luminophore is in contact with the radiation receiver. While the generation of luminescence radiation is prevented and the radiation receiver is in contact with the auxiliary liquid and/or with a substitute liquid, a darkness measurement signal is measured for the radiation receiver.

Abstract: In a process for determining the concentrations of ligands (9, 10) in a sample to be analyzed, ligands (9) of a first ligand type are bond-specific for receptors (6) of a first receptor type, and ligands (10) of a second ligand type are bond-specific for receptors (8) of a second receptor type. A first receptor (6) of the first receptor type is immobilized at least one first test site (5), and a second receptor (8) of the second receptor type is immobilized at a second test site (7) on a substrate (23). A third receptor (11) of the second receptor type is mixed with the sample in such a way that it is present in a specified concentration in the mixture that is obtained in this manner. The mixture is caused to contact the substrate in such a way that at least one ligand (9) of the first ligand type can bind to the first receptor (6) and ligands (10) of the second ligand type can bind to the second receptor (8) and to the third receptor (11).