Non invasive moisture content measurement in paper web using microwaves

Microwave energy offers the drying/curing industry a new prospect in efficient and uniform drying. In paper drying, due to the fact that absorption power depends on loss factor, more heat is developed in wet areas thus resulting in automatic moisture profile correction. During drying the most important parameter is maintaining the pre-prescribed level of moisture content. The correlation equation between absorbed power and moisture contents has been developed, in order to program the controlling hardware related to the level of drying power.