Macro Sensors' MLW Series of Long Stroke Linear Position
Sensors are for absolute position measurement of
displacements up to 1.2 m. Available in ranges of 300 (11.8) to 1,200 mm (39.4
inch), these contactless linear position transducers are useful for hydraulic
cylinder and actuator feedback applications where the sensor can either be
mounted externally or embedded into the cylinder or actuator body.
Utilizing 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 24V dc, the MLW Series of Long Stroke Linear Position
Sensors have less than +/-0.25 percent linearity and +/-0.01 percent
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.
Self contained electronics, a stainless steel
probe and die cast probe head with an IP66 rating and tube IP67 make
transducers useful 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 5,000
psi, 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.
