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Position sensors tout reliability

Posted: 08 Dec 2008 ?? ?Print Version ?Bookmark and Share

Keywords:linear position sensor? LP750 long stroke? equipment assembly?

LP750 series linear position sensors

Macro Sensors has announced the LP750 series linear position sensors, non-contacting long stroke sensors that operate in rugged environments while delivering performance from 0-4inches to 50inches. With the ability to be almost the same length as the stroke, the LP750 sensors are ideal for long stroke applications. Moreover, they open new possibilities in using this sensor technology in place of failing potentiometers in industrial position measurement applications such as machine tool positioning, hydraulic cylinder positioning, valve position sensing and automatic assembly equipment.

Constructed entirely of stainless steel, these hermetically sealed, frictionless position sensors withstand the harsh and corrosive environments found in steel mills, power plants and petrochemical plants. Their reliability and capacity to withstand high ambient temperatures make them suitable for the position feedback of steam control valves in power plants. Meanwhile, their significant stroke to length advantage and environmental robustness in environmental extremes enable their use in cylinders implemented in hydraulic rams such as those found in construction equipment. The sensors can also be used in petroleum applications to provide down-hole drill head directional drilling position feedback control and valve position.

Units also operate reliably and accurately while buried in oil and under water pressure. A low operating frequency allows the signal process to be remotely located in applications of high temperature and radiation. With remote electronics, the linear position sensor can operate up to 500F and 30 million Rads.

Offering frictionless position feedback similar to the potentiometer, the linear position sensors have no parts that wear out, offering unlimited cycle life and greater performance than a pot. Units incorporate a digitally enhanced analog output that, with the coil winding configuration, enables a compact design much reduced in size compared with a linear variable displacement transducer. Microprocessor electronics also provide better unit-to-unit consistency and nonlinearity.

The LP750 series linear position sensors are available in standard ranges of 95mm to 600mm and are offered in three outputs including a 5V DC input with 0.5 to 4.5V DC output, a pre-calibrated, loop-powered 4-20V DC I/O or a nominal 24V DC input 0-10V DC output. The low-voltage, power regulation 5V DC input works with micro-controlled based systems and allows the signal processing electronics to be located remotely in hostile applications such as high temperature, vibration, shock and radiation.

- Wolfgang Patelay
Industrial DesignLine Europe

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