Moisture content determining device for a region of a web (e.g. of paper) has an electromagnetic wave transmitter and receiver moving transverse to the web

摘要

A device for determining the moisture content of web in a web production machine using a moisture sensor (1) operating with electromagnetic waves and positioned transverse to the web running direction to measure moisture content over the web breadth is such that the waves from a transmitter (2) are directed via a wave conductor (12,15) to a surface region (8) of the web and then via a conductor (12,15) to a receiver (3).