SJE-Rhombus SES Controls Float Switches

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SJE MilliAmpMaster™

Mechanically-Activated, Narrow-Angle or Wide-Angle Control Switch

Control switches accurately monitor liquid levels to activate pump control panels and alarms.

The SJE MilliAmpMaster™ control switch is narrow-angle or wide-angle control switch that offers control for AC or DC applications in wastewater and sewage.  The internal switching mechanism has seal gold cross-point contacts for reliable low current operation.  It features a blue colored cap for easy identification.

Common applications include PLC (programmable logic controller) panels, IS panels with intrinsically safe barriers, low current solar applications and other low current control panels and alarm applications.

The wide-angle version activates/deactivates at approximately 4 inches above and below horizontal with a 3.5 inch tether.  The narrow-angle version activates/deactivates at approximately 1.5 inches above or below horizontal with a 3.5 inch tether.

This switch is not sensitive to rotation.

Normally Open Models (high level): The control switch turns on (closes) when the float tips slightly above horizontal signaling a high level and turns off (opens) when the float drops slightly below horizontal. 

Normally Closed Models (low levels): The control switch turns on (closes) when the float tips slightly below horizontal signaling a low level and turns off (opens) when the float tips slightly above horizontal. 


SJE MilliAmpMaster™


  • Low current, non-arcing applications down to 0.160 mA at 125 VAC
  • Mechanically-activated, snap action contacts
  • High impact, corrosion resistant polypropylene float housing


  • For normally open (high level) or normally closed (low level) applications
  • With narrow-angle or wide-angle pumping ranges
  • In standard cable lengths of 10, 15, 20, or 30 feet (3, 5, 6, or 10 meters)
  • Two mounting options for flexibility in installation:
    Mounting Clamp: for applications where the float can be attached to a discharge pipe or similar mounting device
    Externally Weighted: for applications where the float can be suspended from above

UL Listed, CSA Certified

Five-Year Limited Warranty



SJE MilliAmpMaster™


Flexible 18 gauge, 2 conductor (UL, CSA) SJOW, water-resistant (CPE) jacket

2.74 inches diameter x  4.83 inches long (7.0 x 12.3 cm) high impact, corrosion resistance, polypropylene housing for use in sewage and water up to 140oF (60oC)

30 feet (9 meters), 13 PSI (90 kPa)

125 VAC:
Maximum Electrical Load: 1 amp
Minimum Electrical Load: 0.160 milliamps

30 VDC:
Maximum Electrical Load: 0.1 amps
Minimum Electrical Load: 0.160 milliamps

5 VDC:
Minimum Electrical Load: 1 milliamps


Available Downloads

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