SJE Rhombus (SJ Electro)

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 line of pump control and singal floats and electrical controls.