The StenOgraph is a non-contact system. A narrowly focused x-ray beam penetrates the moving continuous panel at an angle of 45° and is measured at 2 positions. A stationary detector measures the transmitted radiation and a moving detector measures the scattered radiation. The density-dependent value is such that in any part of the panel cross section a thickness value can be calculated.
The STENOGRAPH is equipped with a calibration check. Calibration is done outside the material flow.
GreCon measuring systems are constructed according to the generally acknowledged rules of technology and are thus safe to operate. All flexible parts of the StenOgraph are covered by a protective cover. The protective measures of the x-ray beam exceed those which are demanded by legislation.