West Instruments is a manufacturer of controllers and indicators for process control applications. Formed in 1946, West was one of the first controller manufacturing companies to market microprocessor based temperature controllers. It was at the forefront in the development of self-tuning algorithms. West Instruments product brand has been rebranded simply as West and together with CAL, Partlow and PMA it has formed West Control Solutions.

ISS provides the full range of products developed by West.