A conveyor includes a plurality of conveyor disks that are arranged coaxial to one another and are rotatable about a common central rotational axis, wherein teeth are distributed around the edge of said conveyor disks. In accordance with one aspect of the invention, the system includes a set of sensors configured to detect a variety of service conditions, including products being low or out of stock, as well as, out of order conditions. The work surfaces have at least three sides with at least two of the sides being adapted to releasably couple with one of the support members. The movable plates are driven by the elastic members so that the plates can rock into first and second deflection positions to contact the first convex portion. impulsive noise components, included in the multicarrier signal and interference removal means for substantially removing the interference components from the multicarrier signal. The hydrogen-bearing constituent of the material may be further quantified by knowing or estimating the chemical or molecular structure of the material.