SJE MilliAmpMaster™ WPS

Potable Water Control Switch

The SJE MilliAmpMaster™ WPS mechanically-activated narrow angle control switch offers reliable low current control for AC and DC potable water applications. The internal switching mechanism has sealed gold cross-point contacts for reliable low current operation. Common applications include PLC (programmable logic controller) panels, low current solar applications, and other low current control panels and alarms applications in potable water.

This potable water control switch activates/deactivates at approximately 1.5” (3.81 cm) above and below horizontal with a 3.5” (9 cm) tether. It is not sensitive to rotation.

Looking for a potable water pump switch? Check out our SJE PumpMaster® WPS.

milliampmaster wps


  • Low current, non-arcing applications down to 0.160 mA at 125 VAC.
  • Orange colored cap for easy identification of SJE MilliAmpMaster™ WPS potable water control switch.
  • 3 wire cable – SPDT (Single Pole Double Throw) can be wired as normally open or normally closed.
  • CSA Certified to meet NSF/ANSI 61 standard for use in potable water. Approved for use in tanks of 250 US gallons (950L) in volume or greater per float.



Flexible 16 gauge, 3 conductor (UL,CSA) SJOW, water-resistant (CPE)


2.74 inch diameter x 4.83 inch long (7.0 cm x 12.3 cm), high-impact, corrosion resistant, polypropylene housing for use in sewage and water up to 140°F (60°C)


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

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


Minimum Electrical Load: 1 milliamp


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