Devices used to detect (optical, Hall effect, inductive, etc.) or measure changes in displacement.

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Capacitive linear position sensors are devices that sense position / displacement using capacitance technology.
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Eddy current linear encoders detect the distance from a target by using magnetic fields generated by a reference and sensing coils.
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Hall effect position sensors are non-contact devices that convert energy from a magnetic field into an electrical signal. They use the Hall effect, a voltage caused by current-flow in the presence of a magnetic field.
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Inductive linear position sensors and switches are noncontact devices that determine an object's coordinates (linear or angular) with respect to a reference.
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Linear Encoders (267 suppliers)

Linear encoders sense and digitize linear position change for positional measurement and feedback to control systems.
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Linear position sensors is a general search form for all linear position / displacement detection product areas.
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Linear potentiometers are sensors that produce a resistance output proportional to the displacement or position.
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Linear variable differential transformer (LVDT) linear position sensors have a series of inductors in a hollow cylindrical shaft and a solid cylindrical core. These devices produce an electrical output proportional to the position of the core
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Magnetoresistive linear position sensors and switches have a linear resistance output signal representing the distance an object is from a reference point.
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Magnetostrictive position sensors are non-contact linear position sensors that use the momentary interaction of two magnetic fields to produce a strain pulse that moves along a waveguide. One field is from a magnet that moves along the outside of the waveguide. The other field is from the waveguide itself.
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Optical linear encoders use fiber optic technology to sense position and displacement.
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Laser micrometers measure extremely small distances using laser technology.
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Optical triangulation position sensors use reflected waves to pinpoint position and displacement. The source of these waves may be a light emitting diode (LED), infrared (IR) light, or laser.
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Photoelectric Sensors (429 suppliers)

Photoelectric sensors use emitters and receivers to detect the presence, absence, or distance of target objects.
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String Potentiometers are used to measure the movement and displacement of objects. A cable or wire is attached to an object, and as the object moves, the transducer produces an electrical signal proportional to the wire's linear extension.
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Time of flight optical sensors determine displacement and distance by measuring the time it takes light to travel from the instrument to a target and back.
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Ultrasonic linear position sensors and switches use ultrasonic waves in combination with light and frequency readings for position and displacement sensing.
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Variable reluctance linear position sensors and switches are noncontact devices that use variable reluctance based technology, and whose output signal represents the distance between an object and a reference point.
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