Ring and tube sensors with inductive sensor technology are available from ifm electronic. They have a high resolution, as well as a fast response time of 0,2 ms, and can even detect steel balls with a diameter of only 0,6 mm at a speed of up to 35 m/s. The static and dynamic versions are easy to adjust. The normally closed and normally open function can be selected. Pulse stretching and sensitivity can be adjusted via a potentiometer, saving time and cost during installation.
For the ring sensors, the tube is guided through the ring. The safe detection of screws, rivets and springs is not disturbed as the sensing field lies completely inside the ring. Tube sensors have the advantage that they are easy and quick to install by means of cable ties. One type can be used for different tube diameters. Typical applications are in the handling industry; in the manufacture of wire, iron, sheet metal and metal products and fittings, and in special-purpose machinery. The ring and tube sensors are distinguished by their robustness and excellent price to performance ratio.
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