A multiturn rotary encoder is a sensor that measures the angle of rotation of a shaft, as well as the number of complete revolutions that the shaft has made. This is in contrast to a single-turn encoder, which only measures the angle of rotation, 0 – 360°. Multiturn encoders are used in a variety of applications where it is important to track the position of a moving object, such as in machine tools, robotics, and automation systems.

An Inductosyn is type of inductive position sensing device from Farrand Controls/ Ruhle Companies. Inductosyns work using the same basic physics as a transformer using planner arrays of inductive windings.

Recently, obtaining the Inductosyn and components for maintenance has become more difficult. For decades the Inductosyn from Farrand Controls / Ruhle Companies sat near the top of the rotary sensor hierarchy. Providing sub 2 arcsec (0.5 mdeg) accuracies, it combined the robustness of a resolver with the performance of the best optical encoders. Despite its shortcomings, it found plenty of customers, from airborne infrared and radar systems, to telescopes, satellite communication antennae (SATCOM), machine tooling and low-pressure vacuum chambers.

Surge relief is an important component in many liquid handling systems. Whether it be a pipeline, storage terminal or loading station, these systems help to protect people and the environment around it.