SEIN S.A. was created in June, 29th of 1987 by Puffer Sweiven, Inc.

In 1988, the American company Fisher Controls Inc., gave its confidence and representation to SEIN at the same time that Crosby Valves Inc.

Fisher – Rosemount company, in 1996, gave the representation to SEIN of the next brands: Rosemount, Inc., Rosemount Analytical, Inc., Micro Motion, Inc., Xomox, Inc., Brooks Instrument and Fisher – Rosemount Systems, Inc.

At the beginning of 2000, SEIN creates the Services Department to develop Projects and gives technical support to our customers.

The company Tyco Flow Control acquire Crosby Valves, Inc., and gave to SEIN the  representation of: Crosby Valves, Inc.,  Anderson Greenwood and Anderson Greenwood Instrumentation in 2001.

In 2003, Fisher – Rosemount acquire Daniel  Measurement and Control and gave to SEIN its representation.

In 2003, Pepperl & Fuchs gave its representation of products and accessories of Intrinsic Security of Digital Buses on Field.

In 2004, the company Atmos Internacional, Inc. world´s leader in Leak Detection System gave its representation and confidence to SEIN.

In 2005, SEIN obtained the representation of Bettis, Shaffer and Hytork as part of the group Emerson Process Management.

In 2005and 2006, SEIN has enabled to its workers for the division of Emerson Process Management, Asset Optimization, for give our customers a service of high quality.