Dwyer Instruments L6-EPB-B-S-3-H Switch

The Dwyer Instruments L6-EPB-B-S-3-H Switch is a heavy-duty Flotect liquid level switch engineered for reliable tank level monitoring in hazardous industrial environments. This model features a rugged brass upper housing and brass lower housing, with a leak-proof lower body machined from solid bar stock to prevent process fluid migration into the electrical compartment. Utilizing a magnetically actuated design, it eliminates mechanical linkages that commonly fail in high-cycle applications. The 304 stainless steel spherical float is housed within a brass external float chamber, designed for horizontal mounting via a 1" NPT process connection. Rated as weatherproof and explosion-proof, this SPDT switch supports direct pump control and level alarm functions in sumps, boilers, and wastewater systems. It operates effectively in temperatures ranging from -4 to 220°F and maintains a pressure limit of 250 psig, making it a staple for contractors requiring high-accuracy liquid level control without constant maintenance.

• Explosion-Proof Reliability: UL and CSA listed for Class I, Groups B, C, and D, and Class II, Groups E, F, and G, ensuring safety in volatile atmospheres.
• Magnetically Actuated Operation: The SPDT snap switch is triggered by magnetic coupling, removing the need for a bellows or seal that could leak.
• Simplified Maintenance: The electrical assembly can be serviced or replaced without removing the brass lower housing from the process line, preventing system downtime.
• External Float Chamber: The integrated brass tee allows for convenient side-mounting on tanks where internal float clearance is limited.
• Corrosion Resistance: A 304 stainless steel float and brass wetted materials provide excellent compatibility with alcohol, oils, and water-based liquids.

Common Questions

What is the minimum specific gravity required for this float?
The spherical 304 SS float in this configuration typically requires a minimum specific gravity of 0.7 for reliable buoyancy and switch actuation.

Can I use this level switch for DPDT applications?
The L6-EPB-B-S-3-H comes standard with a Single Pole Double Throw (SPDT) switch. If your control logic requires DPDT, please consult our technical team for compatible alternative models.

What is the correct mounting orientation for this unit?
This switch must be installed horizontally. Ensure the index arrow on the side of the housing is pointing vertically downward for the magnetic link to function correctly.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.