I need to measure silicon carbide level in an silo which is freely falling from above, both high and low levels are needed. I feel vibration tuning fork is best suited can any one suggest or guide me for reliable sensor.

 

If you need hi/lo, tuning fork would work well. If you want continuous, laser may work and from what some air radar manufacturers claim that could be an option also.

endress.com
ohmart/vega.com

These are two of the air radar manufacturers.

Larry K.