The MAC3 Float Switch is a world-renowned, professional-grade level regulator designed for the automatic control of electrical equipment like pumps, solenoid valves, and alarms. Produced by MAC3 Spa in Italy, this specific model is celebrated for its "Original" double-chamber design, which offers unmatched reliability in both clean and contaminated water.

The 3-meter version provides a versatile cable length for medium-sized tanks, sumps, and wells.

Key Features

• Double Liquid-Proof Chamber: Unlike cheaper single-molded floats, the MAC3 features a secondary internal chamber that protects the microswitch. Even if the outer shell is damaged, the switch remains dry and functional.

• Edge-Free Shape: The rounded, streamlined "Original" shape prevents the float from getting snagged on debris, rags, or turbulent water—making it the gold standard for sewage and wastewater applications.

• 3-Wire Versatility: The SPDT configuration allows you to choose the logic:

  • Filling Mode: Turns the pump ON when the water is low (NC).

  • Emptying Mode: Turns the pump ON when the water is high (NO).

• Included Counterweight: Usually comes with a clip-on weight that allows you to adjust the "pivot point," effectively setting the exact height at which the switch toggles.

Common Applications

• Sump Pump Automation: Automatically draining basements or pits.

• Storage Tank Management: Ensuring overhead tanks are refilled when they reach a low threshold.

• Dry-Run Protection: Preventing a submersible pump from running when the water level is too low to cool the motor.

• Industrial Sewage: Managing fluid levels in treatment plants where solids are present.

Wiring Guide (Standard Colors)

• Black (Common): The main power feed.

• Blue (Emptying): Connect here to turn a pump ON when the float is UP (to drain a tank).

• Brown (Filling): Connect here to turn a pump ON when the float is DOWN (to fill a tank).

Safety Note: While the switch can handle high current, it is best practice to use it with a contactor/relay when driving heavy industrial pumps to extend the life of the internal microswitch.