Description
The Dwyer L4 Float Switch is a rugged, industrial-grade liquid level control solution engineered for demanding HVAC, mechanical, and process applications. Built with a durable brass body and a corrosion-resistant 316 stainless steel float, the L4 is designed to withstand harsh environments where reliability is non-negotiable.
Key Features
- Brass body construction for strength and long service life
- 316 stainless steel float for superior corrosion resistance in aggressive media
- Side wall mounting design for flexible tank and vessel installation
- Weatherproof and explosion-proof housing for safe operation in hazardous locations
- SPDT (Single-Pole Double-Throw) snap switch action for reliable, positive switching
Application Benefits
The L4’s weatherproof and explosion-proof enclosure makes it suitable for use in classified hazardous areas, outdoor installations, and industrial environments exposed to moisture, dust, or flammable atmospheres. The SPDT snap switch provides both normally open and normally closed circuit options, giving installers maximum wiring flexibility for pump control, alarm, or shutdown applications.
Construction & Design
- Body material: Brass
- Float material: 316 stainless steel
- Mounting style: Side wall
- Enclosure rating: Weatherproof and explosion proof
- Switch type: SPDT snap switch
Typical Applications
- Boiler and hydronic system liquid level control
- Pump start/stop and high/low level alarms
- Tanks, sumps, and reservoirs in HVAC and industrial settings
- Hazardous location liquid level monitoring







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