Data file created and used by LabQuest, an interface used to collect sensor data; stores experiment results recorded from a LabQuest device; may contain data-collection settings, data tables, analyses, graphs, and notes.

You can save QMBL files to the storages space on the LabQuest device or exported to external storage space such as a microSD card or USB flash drive. The file can also be opened by Vernier's Logger Pro and Logger Lite applications. While the Graphical Analysis iOS app can import most data from the QMBL file, it cannot import calculated columns from the file.