Screen coefficient determination device

The utility model discloses a screen coefficient determination device. The screen coefficient determination device comprises a glass pipe body with a spherical liquid containing cavity in the middle, wherein an upper scale mark and a lower scale mark are horizontally arranged at the peripheries of the glass pipe body above and under the spherical liquid containing cavity respectively; a spherical buffering cavity is formed in the glass pipe body located above the upper scale mark; the spherical buffering cavity and the spherical liquid containing cavity are located in a transparent constant-temperature cavity; and an upper pipe opening and a lower pipe opening of the glass pipe body extend out of the top wall and the bottom wall of the transparent constant-temperature cavity respectively. The screen coefficient determination device has the advantages that the screen coefficient determination device is specially designed for determining polyacrylamide screen coefficients; the spherical buffering cavity and the spherical liquid containing cavity are located in the transparent constant-temperature cavity so that the transparent constant-temperature cavity and an external constant-temperature water pipeline form circulation by a circulating-water water inlet and a circulating-water water outlet when the screen coefficients are determined, namely, the constant-temperature state of a test sample solution can be conveniently realized, so that the accuracy of determining the polyacrylamide screen coefficients is guaranteed and the working efficiency of determination operation is improved.