Sensors and instruments used to detect rotary position, angular position, tilt, or inclination relative to the horizon or a linear position.

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Absolute rotary encoders use optical, mechanical, or magnetic indexing for angular measurement. They do not lose their position after power-down, but instead provide absolute position upon power-up without requiring a home cycle or any shaft rotation.
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Compasses (51 suppliers)

Compasses are navigational instruments that determine direction relative to Earth’s magnetic poles.
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Gyroscopes (69 suppliers)

Gyroscopes are designed to measure angular rate or orientation about a given directional vector.
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Incremental rotary encoders are multi-turn sensors that use optical, mechanical, or magnetic index-counting for angular measurement. They contain no absolute reference, but instead count relative to the turn-on position.
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Inertial navigation systems use a combination of accelerometers and angular rate sensors (gyroscopes) to detect altitude, location, and motion. They may also be capable of detecting attitude, position, velocity, temperature, or magnetic field.
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Linear Encoders (266 suppliers)

Linear encoders sense and digitize linear position change for positional measurement and feedback to control systems.
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Optical encoder disks and strips are components of rotary and linear encoders, respectively. They are usually made of metal, plastic, glass, or paper. Optical encoder disks and strips have evenly-spaced holes or markings around their perimeter or length.
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Rotary position sensors include potentiometers, resolvers and a variety of magnetic and capacitive technologies. Sensors are designed for angular displacement less than one turn or for multiturn displacement.
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Tilt Sensors (139 suppliers)

Tilt sensors measure tilt angle with reference to the earth’s ground plane.
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