Since 1975, SJE (S.J. Electro Systems, Inc.) has built a reputation as a world leader, providing trouble-free liquid level controls for water, wastewater, sump, and sewage systems. With the creation of the Rhombus® Technology division in 1991, SJE-Rhombus now represents the most reliable integration of liquid level controls and motor control panels in the industry, designed with you in mind!

SJE-Rhombus® pump switches automatically control a variety of water and wastewater pumps; the control switches accurately monitor liquid levels. The company offers alarm systems that warn of threatening liquid level conditions, and the Rhombus® panels effectively control pumps and motor controls.
 

Please click here for SJE-Rhombus official website