TSTM Co Inc, based in Sioux Falls, SD, is a trusted industry leader in the manufacturing of secondary voltage transformers for electric metering applications. Their products are designed to create a safe working environment, ensure revenue grade accuracy, and provide essential component protection for utility, industrial, and commercial installations.
With a commitment to quality and safety, TSTM Co Inc's unique line of products is manufactured and assembled in the USA, earning the trust of Investor-Owned Utilities, Electric Cooperatives, and Municipal Utilities across the United States.
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