The E+H FMU90 level gauge measures liquid levels that contain foam
Thread Content
Our plant uses the E+H Prosoonic S FMU90 type level gauge. In actual use, fluctuations in the readings occur due to foam on the surface of the liquid in the tank. This level gauge is installed above a sealed tank, which is 10 meters high. How should the level gauge be set up, or should another type of gauge be used? I would greatly appreciate any advice from those who are more experienced! Thank you!
If the interface being measured contains a lot of foam, then contactless level gauges such as radar and ultrasonic ones are not suitable. If the liquid density remains essentially constant, the pressure is at normal levels, and there is no mixing, then a static pressure level gauge using a plumb line is a better choice.
I remember that the radar level gauges from Coriolis seem to be able to filter out foam layers; I’m not sure if the E+H models have this capability. The liquid in question is quite turbid and somewhat corrosive, so static pressure level gauges could also work. If nothing else works, then we’ll go with a static pressure gauge
In this contactless approach, if there isn’t much foam, it is possible to use a manual controller to optimize the echo curve; however, this method won’t work when the surface is completely covered in foam.