Cryogenic sensors are based on physical phenomena such as superconductivity at low temperatures. Superconducting quantum interferometers (SQUIDs) allow physical quantities that can be converted into a magnetic flux to be measured. These quantities are primarily magnetic fields and magnetic material parameters, but also electric currents and temperatures. Cryogenic sensors and SQUIDs enable precision measurements in metrology and fundamental research, but they are also used in commercial measuring systems for materials research or applied geophysics.
