A Sand Equivalent Metal Funnel is a specialised laboratory tool used in conjunction with the Sand Equivalent Test, which is a test used to determine the relative cleanliness, or amount of fine dust or clay-like materials, in granular soils or fine aggregates such as sand.
The metal funnel is used to pour the fine aggregate sample into a graduated cylinder in a controlled manner to ensure consistent compaction and distribution of the material during the preparation stage of the test.