A portable measuring system which analyzes a liquid sample for at least one analyte. The portable measuring system has a substantially moisture-proof housing with an internal atmosphere. The housing prevents moisture from the air and water vapor from penetrating into the housing. The portable measuring system also has at least one test element support inserted into the internal atmosphere of the housing. The test element support is equipped with a retaining structure and a test element that is supported by the retaining structure. The test element support is designed such that, after insertion into the internal atmosphere, the test element is exposed to the internal atmosphere. A release mechanism is also provided which can convey at least one test element into an application position within the internal atmosphere of the housing. In this application position, the liquid sample can be applied to the test element.
