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  • SJ Electro Systems, Inc. dba CSI Controls & Primex

    • Manufacturing - Industry
    220 Ohio Street
    Ashland, OH 44805
    (419) 281-5767
    (419) 289-3592 (fax)
    • About

      SJE-Rhombus offers a wide variety of control products for residential, commercial, municipal, and industrial markets. From control panels utilizing embedded circuit board technology, to complete control and monitoring systems designed and built to individual specifications, SJE-Rhombus represents the most reliable integration of engineering and manufacturing capabilities in the industry.

      New product designs endure extensive in-house and field testing before submittal to recognized independent laboratories for safety testing and approval. Each product is constructed of materials of the highest quality with expert workmanship and delivered in responsive lead times. This commitment to quality ensures you a dependable, trouble-free product. SJE-Rhombus is so confident in the superior quality and performance of our controls, that nearly every catalog product leaving the factory is backed by a five-year limited warranty.