Welcome to Farrand Controls Division, Ruhle Companies, Inc, manufacturers of Inductosyn® transducers used for accurate measurement of angular or linear position displacements.  Inductosyn® transducers combine high accuracy, extreme reliability, and ruggedness to meet the demanding requirements of harsh military, space, and industrial environments.

Currently, Inductosyn® transducer applications include space satellites, submarine navigation systems, antenna pedestals, tracking mounts, telescopes, factory automation, robotics, machine tool control, cryogenic chambers, and hard vacuum chambers. 

In business since 1955, the quality and accuracy of our products have earned us recognition as the leader in the field of high precision position control.

FOCI Opto Encoders

Offers virtually every type of Optical Encoder both self-contained and modular.

FOCI also repairs and manufactures exact replacements for encoders previously manufactured by Sequential Electronic Systems Inc.      

Farrand Optical Instruments

Offers high performance filter fluorometers for a wide range of applications, representing the latest technology for fluorescence detection instruments in a line that has been in development since 1944.