About us
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QSI (a.k.a. QS Industries, Inc.) has been in business since 1983. It is a general electronic design company that specializes in model train products, Bio-medical Instrumentation, and Integrated Circuits. QSI has supplied many model train companies with high-quality state-of-the-art sound and train control systems including:
Ajin
American Hobby DistributorsAtlasAustrainsBio-ControlBroadway Limited ImportsCanadian Hobby CraftHouse of DuddyCharles RoEureka modelsIntermountain Railroad CompanyKorea BrassLife-LikeLionelMikes Train HouseMKTRed CabooseScale Tin RailSGL LinesSunset ModelsTenshodoThird-Rail TrainsTonys Train ExchangeWalthersWeaver ModelsWilliams Electric Trains.
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