SJE Rhombus MilliAmpMaster™ WPS Control Switch for Potable Water, NSF Certified, SPDT, for Precision AC/DC Applications, CSA/UL Listed

SJE MilliAmpMaster™ Float Switch for Potable Water Applications

The SJE MilliAmpMaster float switch is a mechanically-activated, narrow-angle, NSF/ANSI 61 certified control switch designed for reliable low-current control in AC and DC potable water applications. This SJE MilliAmpMaster WPS model is ideal for use as a control float switch in PLC systems, alarm panels, and low-current control circuits.

Constructed with sealed gold cross-point contacts, this SJE Rhombus float switch ensures consistent, non-arcing performance in sensitive, low-amperage environments, making it a reliable low-current float switch for control panel and solar applications.

This SJE MilliAmpMaster float switch activates and deactivates at approximately 1.5 inches above and below horizontally, using a 3.5-inch tether for precise level control. It is not sensitive to rotation, ensuring consistent operation in real-world installations.

NSF/ANSI 61 Certified (Potable Water Approved)

Meets strict drinking water safety standards, making it suitable for potable water tanks, municipal systems, and water treatment applications.

Key Features of the SJE MilliAmpMaster Float Switch (Low Current Control Switch)

• Low Current, Non-Arcing Operation: Designed for applications down to 0.160 mA, making it ideal as a low amperage float switch for control circuits and PLC systems
  

• Sealed Gold Contacts: Provides reliable switching performance for sensitive electronics and non-arcing float switch applications
  

• Narrow Angle Activation: Activates/deactivates at approximately 1.5” above and below the horizontal for precise level control
  

• SPDT Functionality (3-Wire): Can be wired as normally open or normally closed, offering flexible system integration
  

• Not Sensitive to Rotation: Ensures consistent performance regardless of float orientation
  

• Durable Polypropylene Float: High-impact, corrosion-resistant construction for long-lasting use
  

• Potable Water Certified: NSF/ANSI 61 compliant, making it a trusted potable water float switch
  

• Easy Identification: Orange cap for quick visual recognition
  

• 5-Year Limited Warranty: Backed by SJE Rhombus reliability 

NSF-Certified Float Switch for Potable Water Control Applications

The SJE MilliAmpMaster float switch is purpose-built for applications where traditional float switches are not suitable.

Common Applications:

• PLC (programmable logic controller) systems

• Control panels and relay systems

• Alarm float switch systems

• Low current solar applications

• Potable water storage tanks

• Water treatment systems

This makes it an excellent float switch for control panel integration, especially where precision and low current switching are critical.

How the SJE MilliAmpMaster Float Switch Works

This narrow-angle float switch is designed for accurate and repeatable activation.

• Activates at approximately 1.5 inches above horizontal

• Deactivates at approximately 1.5 inches below the horizontal

• Uses a 3.5-inch tether length for tight control range

Wiring Configurations:

Normally Open (High Level):

Turns ON when the liquid rises and the float tips above the horizontal

Normally Closed (Low Level):

Turns ON when liquid drops and the float tips below the horizontal

This flexibility allows the SJE MilliAmpMaster WPS to be used in both pump-up and pump-down control applications.

Electrical Performance (Low Current Precision)

This low-current float switch is engineered for sensitive electrical systems:

• 125 VAC

• Max Load: 1 amp

• Min Load: 0.160 mA

• 30 VDC

• Max Load: 0.1 amp

• Min Load: 0.160 mA

• 5 VDC

• Min Load: 1 mA

Perfect for:

• PLC float switch systems

• Low-voltage control circuits

• Non-arcing control applications

Specifications