An apparatus and method for the non-contact measurement of tension in a moving
web material are provided herein. In one embodiment the apparatus includes a non-contacting
tension-sensing element, such as an airfoil, disposed transverse to the machine
direction of the web material at least one sensor capable of detecting a reaction
of the non-contacting tension-sensing element to changes in the tension of the
moving web material and a data processing system capable of determining a web tension
analog value that is proportional to the tension of the web material.