SJE Rhombus Pump Switches & Accessories 
SJE-Rhombus® wide angle pump switches are designed to provide automatic control of pumps in non-potable water and sewage applications. The SJE PumpMaster®, SJE PumpMaster® Plus and SJE PumpMaster® SPDT pump switches passed NSF Standard 61 protocol by an approved Water Quality Association laboratory for use in potable water applications.