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Macro Sensors has introduced the MLW Series of long-stroke linear-position sensors, which provide absolute position measurement for hydraulic cylinder/actuator feedback and tank leveling.

Available in ranges of 300mm (11.8″) to 1,200mm (39.4″), these contactless linear-position transducers are ideal 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 analog voltage, current and SSI.

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

Where other sensing technologies are limited by their size, the MLW long-stroke linear-position sensors have excellent 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 transducers suitable for measuring the position of moving machine parts in physically demanding applications, such as paper and pulp mills, injection molding 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 5,000psi, 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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