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Macro Sensors has introduced the MLW series of long stroke linear position sensors for hydraulic cylinder and actuator feedback applications.

The MLW series provides highly accurate absolute position measurement of displacements up to 1.2m.

Available in ranges of 300mm (11.8in) to 1,200mm (39.4in), these contactless linear position transducers are suitable for hydraulic cylinder and actuator feedback applications where the sensor can either be mounted externally or embedded into the cylinder or actuator body.

Utilising magnetostrictive technology, the MLW sensors operate by transmitting a current pulse through its tube that is reflected by a moveable permanent magnet.

The sensor measures the time-of-flight to determine the position of the magnet on the tube.

The time-based position measurement is translated into an output signal.

Powered by 24VDC, the MLW series of long stroke linear position sensors have less than +/- 0.25 per cent linearity and +/- 0.01 per cent repeatability over the full scale with outputs that include analogue voltage, current and SSI.

As these magnetostrictive transducers provide absolute output, no data is lost should power be interrupted.

The MLW long stroke linear position sensors have good stroke-to-length ratio (range/length of unit) especially in longer ranges.

Self-contained electronics, a stainless steel probe and die-cast probe head with an IP66 rating and tube IP67 make the transducers suitable for measuring the position of moving machine parts in physically demanding applications, such as paper and pulp mills, injection-moulding machinery, turbine blades and process level management.

Construction equipment, automotive test stands, flight simulators and valve position are all commonly instrumented with magnetostrictive sensors.

As the sensor probe is sealed up to 5,000lb/in2, the MLW sensors can be packaged within hydraulic cylinders as a closed-loop feedback device.

With an optional float kit for the magnet, the MLW sensors can be used to sense the level of liquid inside of a tank.

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