Abstract: A roller track in a flat stock rolling mill facility includes rollers journalled in a frame having tranversely oriented stiffening traverses extending essentially axis parallel to the rollers, a sensing device for ascertaining absence and presence of rolled stock on the roller track, includes at least one open metallic loop mounted on a traverse in-between two rollers of the track, in a plane extending parallel to a plane of transport but below that plane and being electrically insulated from said traverse; an electric circuit is connected to the loop so that different impedance conditions of the loop are indicative of absence and presence of rolling stock in and on the roller track.

Abstract: A method and apparatus for monitoring the operation of a rotary drum such as a rotary kiln while engaged in thermal processing of fine grained materials such as cement which involves measuring the temperature distribution existing instantaneously during such processing by means of one or more sensors which are not in contact with the drum and comparing the distribution with other parameters related to the thermal processing. Such other parameters may include, for example, the rate of fuel feed, the rate of raw material input, the drum speed, and the driving power supplied to the drum.