SJE-Rhombus®, founded in 1975 and headquartered in Detroit Lakes, Minnesota, USA, operates more than 15 manufacturing facilities in three countries. We provide a wide range of control products for the residential, commercial, municipal, and industrial water and wastewater treatment markets. For over 50 years of purpose-driven innovation,SJE holds over 65 design and utility patents, and our products and services have earned widespread trust and acclaim from customers. We are a global industry leader in control systems,with trusted partnerships established with customers worldwide.

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