Oftentimes users can be exposed to media content such as advertisements while in a non-connective state. The analyzer includes a unit for measuring a sample volume, and has a function of, when sample deficiency is predicted, automatically changing an analysis mode to a decrease sample assay for a part of tests, thereby reducing a sample volume required depending on the measured sample volume. The mixing can occur in a sealed container, and liquid can be transmitted to the device from the sealed container.