Problems with high yield wells near the building teritory.

Hi,
Since HYW are in close distance (50 to 60m) to the building, and the water emitted from the HYW also contains solids in the range of some tens of mg, these wells are considered a hazard to the safety of the building.
At this moment we take manual sand amount measurments from HYW, but now we are interested to get automatic sand measurments.
Maybe experts can give us information about devices in world market, which have this possibility to take automatic measurments of sand amount from water.