Square D 9038DG7 Closed Tank Mechanical Float Switch Alternator

The Square D 9038DG7 is a closed tank mechanical alternator float switch designed for reliable liquid level control in tanks and sumps. This flange-mounted switch features a NEMA 1 rated enclosure suitable for indoor applications where automatic pump alternation is required.

Key Features:

• Mechanical alternator design automatically switches between two pumps to balance wear and extend equipment life
• Flange top mount configuration for secure installation on closed tanks
• 2-5/8 inch minimum water level change post length for precise control range
• Contacts close on rise operation for pump activation as water level increases
• NEMA 1 enclosure provides protection against incidental contact and falling dirt
• Robust mechanical construction with no external power required for switching logic
• Suitable for water, wastewater, and compatible liquid applications

The 9038DG series float switches are widely used in duplex pump systems where alternating operation prevents single pump failure and ensures continuous operation. The mechanical alternator mechanism automatically alternates the lead pump on each cycle, providing balanced run times and reducing maintenance requirements.