Gurley Optical Encoders
Manufacture of rotary and linear optical encoders, absolute and incremental encoders and quadrature encoders. All data sheets in PDF.
http://gpi-encoders.com

Stegmann Inc.
Technical specifications and CAD drawings available online for our Linear Encoders, Absolute Encoders and Incremental Encoders.
http://www.stegmann.com/

Hohner Corp.
Optical Encoders for Hazardous Areas and Systems for Tomorrows Digital OilField
http://www.hohner.com/

Codechamp
Gamme de codeurs optiques rotatifs, codeurs rotatifs, codeurs incrémentaux...Les avantages de la solution codeurs optiques Codechamp !!
http://www.codechamp.com

Industrial Encoders Direct
UK Encoder manufacturers and emergency repairs specialists, Distributors of all encoders, linear, incremental, absolute shaft & rotary encoders, solid, semi-hollow, parallel & shaft encoders, suppliers throughout the United Kingdom & Worldwide
http://www.industrialencodersdirect.co.uk

Encoder Products Company
Encoder Products Company is a leading manufacturer of incremental optical rotary encoders for shaft and hollow bore industrial applications.
http://www.encoderproducts.com/

BEI Technologies, Inc.
BEI is your #1 source for quality optical encoder products, rotary encoders and position sensors for industrial factory automation & motion control, with encoders available in incremental and absolute configurations and designed for rugged, harsh industrial and oil field applications.
http://www.beiied.com/

Leine & Linde AB
Develop manufacture and sell incremental & absolute encoders. Robust products for industrial applications.
http://www.leinelinde.se/

FRABA Posital
Posital manufactures high precision absolute rotary encoders, both optical and magnetic. Posital also manufactures high resolution absolute inclinometers for accurate tilt, level, angle, and wide range sensing.
http://www.posital.com

Photocraft, Inc.
Manufacturer of hollow shaft encoders, wheel encoders, programmable encoders, and absolute encoders. Data sheets viewable online and in PDF.
http://www.photocraftencoders.com