Master Pump Control with SJE Rhombus AmpMaster® Wide Angle Float Switch SJE AmpMaster® 20 Amp wide-angle float switch is a mechanically-activated pump float switch designed for reliable control of sump, sewage, and wastewater pumps. It provides direct control of pumps up to 1-1/2 HP at 120V and 3 HP at 240V, making it a dependable solution for lift stations, septic systems, and high-head sewage applications. This wide-angle pump float switch is not sensitive to rotation or turbulence, allowing consistent performance in both calm and turbulent conditions. Designed for pump-down operation, it activates as the liquid rises and shuts off as the levels drop. With a non-mercury mechanical design, UL/CSA certifications, and a five-year warranty, it delivers long-term reliability. Key Features of the SJE Rhombus AmpMaster Direct Pump Control (20 Amp Rated) Controls pumps up to 1-1/2 HP at 120V and 3 HP at 240V Wide Angle Float Switch Design Provides a larger activation range, reducing pump cycling and extending pump life Pump Down Operation Normally open contacts designed for emptying applications Heavy-Duty Construction Heavy-duty contacts mounted on high-conductivity copper substrates Adjustable Pumping Range 9" to 24" adjustable range Non-Mercury Mechanical Design Eco-friendly and suitable for wastewater environments Flexible Cable Options Available up to 30 feet Corrosion-Resistant Float Housing High-impact PVC housing Water-Resistant Cable 12-gauge SJOW cable (UL, CSA) Includes Mounting Clamp For secure installation How This Wide Angle Pump Float Switch Works This mechanically-activated float switch responds to movement of the float. As liquid rises, the float tilts upward, activating internal contacts and turning the pump on. As levels drop, the float returns to resting position and turns the pump off. The wide-angle design reduces frequent cycling and improves efficiency. Best Applications Sump pump systems Sewage and wastewater systems Lift stations Septic systems Grinder pump applications This makes it an excellent sewage float switch and lift station solution. Pump Down Operation Normally open contacts Pump turns ON when liquid rises Pump turns OFF when liquid drops Technical Specifications Category Specification Product Type Wide-angle float switch Operation Type Pump down Switch Type Direct wiring Application Sump, sewage, wastewater Max Run Current 20 amps Max Start Current 120 amps Voltage 120/240 VAC Max Pump (120V) 1-1/2 HP Max Pump (240V) 3 HP Pumping Range 9" to 24" Cable 12 gauge SJOW Float Material PVC Temperature Up to 120°F Warranty 5-Year Important Electrical & Application Notes Note Details Thermal Protection Required Control Circuits Not suitable Minimum Load Not under 1 amp Capacitor May be required Installation Direct wiring only Get the 20 Amp Rated SJE AmpMaster® Pump Switch Upgrade your system with the reliable SJE AmpMaster® wide-angle float switch. Cleanflow supplies SJE Rhombus products across Canada and the USA. Browse SJE Rhombus Controls & Alarms for more options. Frequently Asked Questions What is a wide angle float switch? A wide-angle float switch provides a larger difference between ON and OFF levels, reducing pump cycling and improving efficiency. What is a pump-down float switch? A pump-down float switch activates when water rises and shuts off when levels drop. Can this be used as a sewage float switch? Yes, it is designed for sewage, wastewater, and lift station applications. Is this a piggyback float switch? No, this model is designed for direct wiring. What size pump can this float switch control? 1-1/2 HP at 120V 3 HP at 240V How do I adjust the pumping range? Adjust the tether length to change ON/OFF range. Where can I buy this product? You can purchase it from Cleanflow across Canada and the USA.
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