Limitation of Sonar Pulse, Radar

The dynamic viscosity of the measured medium must be less than 10 MPa.
At 10 MPa. S < dynamic viscosity < 30 MPa. S, the measure range may be reduced and the blind area may be increased.
It cannot be measured when the dynamic viscosity is > 30 MPa. S. (1 MPa. S = 1 CP).
There should be no dense bubbles in the liquid.
There should not be a large number of suspended substances in the liquid (crystal)
There should not be a large number of sedimentary substances in the liquid, (mud and sand).
The temperature of the measured medium shall be within – 50 ℃ ~ 100 ℃.