A method and apparatus for determining at least one flow parameter of a
fluid flowing within a pipe, which fluid contains particles entrained
within the fluid flow is provided. The method includes the steps of: 1)
determining a velocity of the fluid flow within the pipe; 2) sensing the
impingement of particles on a surface wetted with the fluid flow, and
producing a signal relating to the impingement; and 3) determining the at
least one flow parameter of the fluid flow utilizing the determined fluid
flow velocity and the sensor signal relating to impingement of the
particles on the surface wetted with the fluid flow.