The WIM45-UNTL from Turck is a compact sensor for pneumatic cylinders. The device allows the position of the piston between the ends of the cylinder to be determined at any time so that penetration depths and stroke motion can be detected precisely. This kind of detection is useful for applications such as ultrasonic welding, hot air riveting, bolting, pressing, clamping, cutting or for quality control. The sensor is an efficient alternative to wear-intensive and mechanically cumbersome solutions using potentiometers or expensive linear positioning systems.
The WIM45-UNTL has a total length of only 72 mm and a housing width of 5 mm. The sensor is fastened in the T groove of the cylinder using a wing nut made from tool steel alloy.
The compact sensor consists of a series of Hall elements that produce signals which are processed in a microprocessor. The sensor is not susceptible to interference from external magnetic fields since interference fields can be masked out by comparing all 12 sensor signals. The output signal (0…10V, 4…20 mA) is linearised and does not depend on the N/S polarity of the magnet in the cylinder. The characteristic curve can thus be changed from 0…10 V to 10…0 V by simple rotation. The in-range function detects whether the magnet is within the measuring range and at which end it has left the measuring range.
The sensor is compatible with almost the entire range of accessories of Turck’s BIM-UNT series. This includes accessories for mounting on different cylinder types (profile cylinder, tie-rod cylinders, round cylinders or dovetail cylinders), for fine adjustment of the measuring range, for fixing a reproducible measuring range after mounting a sensor as well as cable fastening clips for secure cable laying.
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