Table 2: Test result under different flow velocity with real sand quality equal to 20g and the diameter between 20 to 40 mesh.

     Velocity(m/s)      Real Value(g) Measurement Value(g) Measurement Error(%)
     9.3      20 13.1564 68.44
     10.0      20 19.5253 4.75
     13.2      20 19.8321 1.68
     16.0      20 19.7531 2.47
     18.1      20 19.7201 2.80
     20.8      20 19.6651 3.35
     23.3      20 19.8859 1.14
     24.6      20 19.6573 3.43
     26.7      20 19.7857 2.14
     28.5      20 19.8772 1.23
     30.1      20 20.2584 2.58
     32.5      20 20.3426 3.43