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About SJE-Rhombus

Integrity In ALL We Do
Learn more about SJE-Rhombus by viewing our Great Place to Work Presentation.

SJE-Rhombus (S.J. Electro Systems, Inc.) was founded on July 2, 1975 by Steve Johnston. It all began with a quest for developing a reliable means of warning homeowners of sewage overflow. The pioneering efforts of Steve brought forth the first Tank Alert® alarm and Sensor Float® control switch. Today, over 30 years later, SJE-Rhombus has grown into a leading manufacturer of reliable, trouble-free liquid level controls for the water, wastewater and sewage industries. Our complete product line includes Build-A-Panel™ control panels, engineered custom control/monitoring systems, Tank Alert® alarm systems, pump switches, control switches and accessories.

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 product leaving the factory is backed by a three-year limited warranty.

Located just outside of Detroit Lakes, MN (the heart of the lakes region in West Central Minnesota), SJE-Rhombus now occupies over 65,000 square feet of manufacturing and warehouse facilities. Our employee-owners (in 1998 SJE-Rhombus became a 100% employee-owned ESOP company) have excellent work habits which creates an atmosphere of high integrity and dedication to being the best in the industry. SJE-Rhombus was named one of 50 Best Small/Medium Companies to Work for America in 2007.

In 2009, SJE-Rhombus was recognized with the "Promising Practices Award" for successful employee fitness, wellness and prevention programs by the Partnership to Fight Chronic Disease. To learn more about working for SJE-Rhombus, please visit our employment section.

The S.J. Electro Systems Foundation is dedicated to improving the quality of life for those in Detroit Lakes and the surrounding communities. We strive to accomplish this with endowments for projects and programs that demonstrate integrity and concern for others through education, personal growth, community development and health improvement. If you would like to apply for a grant from the Foundation, please review the Grant Making Procedures.

Do you want to learn more about the Detroit Lakes area?

Detroit Lakes Chamber of Commerce
Learn more about the 3/50 project.