Liquid level layering detection device

The utility model discloses a liquid level layering detection device which comprises a box body, a detection mechanism and a box cover, a containing cavity with an opening in the upper end is formed in the box body, a bearing table is arranged on the bottom wall of the containing cavity, a positioning groove is concavely formed in the upper end face of the bearing table, and the positioning groove is used for positioning the bottom of a test tube; the detection mechanism comprises a light source assembly and a photoelectric sensor which are arranged on the inner wall surface of the accommodating cavity and are arranged at an interval in the left-right direction, so that light emitted by the light source assembly penetrates through the test tube and is projected to the photoelectric sensor; the box cover covers the opening of the containing cavity, mounting holes are formed in the box cover in a penetrating mode, and the mounting holes correspond to the positioning grooves, so that the test tubes can penetrate