Gamma backscatter thickness measurement for control of multiple-strip rubber calenders

A solution is presented to the problem of measuring and controlling the thickness of individual sheets on a multiple-strip rubber calender. The solution incorporates a proven, accurate, single-sided sensor interfaced to a powerful microcomputer for data handling, displays, control, reports and communications. The technique is based on the principle of Compton photon backscatter. The compactness of the sensor, ease of installation of the required equipment, easy-to-use touch screen video and overall reliability have been demonstrated on a relatively complex gum calender.<>