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Cylinder sensors

Solid-state position feedback sensorsfor pneumatic cylinders. Suitable for most commonly used T slot and C slot designs. Simplified mounting for ease of use and time saving. Robust construction due to two shot moulding process. Range of mounting accessories for clean line cylinders.

Introduction
Position sensing:Cylinder sensors monitor the position of the piston in a pneumatic cylinder. Cylinder sensors are used to sense the position of pistons in pneumatic cylinders.They are directly mounted onto the cylinder. The ring magnet attached to the pistonis sensed through the housing wall of non-magnetisable material (e.g. aluminium,brass or stainless steel). ifm electronic offers different solutions for various cylinder types. Magnetic sensors and cylinder sensors from ifm electronic use state-of-the-art GMR(Giant Magneto Resistive effect) technology. These resistors consist of several extre-mely thin, ferromagnetic and non magnetic layers. Whereas in a conventional Whe- atstone bridge circuit two screened and two unscreened GMR resistors are combi- ned, a large signal proportional to the magnetic field is produced if a magnetic field is present. As from a threshold value an output signal is switched via a comparator. Response sensitivity Operating principle The response sensitivity applies equally to either magnetic polarity and without exter-nal field influence. The magnetic flux density in most pneumatic cylinders is between 5 and 25 mT. ifm electronic's magnetic cylinder sensors are factory set so that they detect these magnetic fields safely. Travel distance The travel distance describes the length of the section which is covered by the mag-net in the sensing zone. It depends on the strength of the magnet. The travel distan- ce of cylinders is between 5 and 20 mm (depending on the cylinder type). The short response times of the sensors allow very high travel speeds. Full product and technical information from www.ifm.co.uk

ifm English catalogue 2008 - 544 50