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

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

Tilt sensors, switches and inclinometers generate an artificial horizon and measure angular tilt with respect to this horizon. They are used in cameras, aircraft flight controls, automobile security systems, and special switches

Rotary encoder disks are round or disk-shaped and have evenly-spaced holes or markings around their perimeter

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

Hall effect proximity sensors are used to detect the proximity, presence or absence of a magnetic object using a critical distance

Rotary limit switches use physically-actuated levers to rotate a shaft and operate the contacts in a switch, making them change state

Linear encoders sense and digitize linear position change for positional measurement and feedback to control systems

Multi-axis Positioning Systems make use of linear, rotary and goniometric stages, slides and drives in various combinations to create standard and custom positioning systems

Valve position indicators are devices that show the position of the closure element

Collision sensors are used to protect robots from colliding with other objects. Noncontact sensors are used to help robots avoid these collisions

Inertial and gyro 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

Condition monitoring and machine maintenance services monitor the condition of critical machines, battery banks, power supplies, processes and rotary equipment. They also perform predictive maintenance (PdM) and/or preventive maintenance

Linear variable differential transformer (LVDT) and rotary variable differential transformer (RVDT) signal conditioners are devices that translate the linear or rotary movement of a ferromagnetic armature into an AC voltage that is proportional to the armature position

Dynamometers are used in motor and engine testing. These devices apply braking or drag resistance to rotation, and measure torque at various speeds and power input levels.