IP68 Protection from New Series of Gefran Absolute Linear Position Transducers. Gefran presents a new series of Absolute Linear Displacement Transducers specifically designed for use under extremely severe environmental conditions. These new Displacement Transducers, called PME and PMI, are the result of constant analysis of market demands and of GEFRAN's 20 years of experience in potentiometer technology, thanks to which our products always provide maximum performance. As opposed to traditional Displacement Transducers with IP65 protection level, this new series, designed typically for oil-pressure cylinders, is completely sealed and guarantees an IP67 or IP68 protection level. The new PME/PMI series exploits magnetic coupling between a cursor outside and a cursor inside the transducer, creating a single system called "magnetic tooth" that resists more than 20 G of acceleration. Elimination of the actuator rod, plus a temperature range of -40°C to +100°C and lack of signal conditioning electronics, mean that these products can be used under severe conditions in which other technologies, based on a greater price/performance ratio, are excluded. PME transducers are built of anodized aluminum, have a 12.7 mm diameter, and guarantee resistance to pressures of 20 bar with maximum cursor shift speed of 5 meters/second. The second family, called PMI, has a structure built entirely of 316 L stainless steel. Designed for position feedback of oil-pressure cylinders with housing inside the piston, it resists up to 250 bar and maintains the classic features of an absolute potentiometer. The PMI transducer has been engineered to allow replacement of the internal cartridge without having to disassemble the hydraulic cylinder, thereby achieving significant savings in maintenance. Standard electrical strokes range from 50 mm to 1000 mm in 50 mm increments, with a life of 100 million strokes or 25,000 Km and a non-linearity error of 0.05%, the standard value for potentiometric transducers built by GEFRAN. __________________________________________________ For more information, please contact :- Gefran CRL Ltd Unit B10, Hortonwood 10, Telford, Shropshire TF1 7ES. UK Tel: +44(0) 1952 604555 Fax: +44(0) 1952 677455 Email: Website: February 2003
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