Compared with perforated pipe distributor, perforated weir-riser distributor has smaller wall flow, bigger operation elasticity and simpler structure, it is easy to install.

The main peak form can be used to evaluate vascular tone and elasticity of the small arteries and arteriole, and to monitor the microcirculation blood flow.

But the elasticity assume existed dissatisfactory aspects to rather fluctuant free surface flow downstream sluice.