Johnson Controls F59A-1 Liquid Level Switch

The Johnson Controls F59A-1 Liquid Level Switch is a heavy-duty sump pump control engineered for precision water-level monitoring in residential, commercial, and light industrial applications. Featuring a DPST (Double-Pole, Single-Throw) contact configuration, this switch handles 120/240 VAC electrical loads with high reliability, specifically designed for sump operation where moisture resistance is critical. The assembly includes a NEMA 1 rated enclosure for internal protection and a fixed mounting bracket for stable installation. This model utilizes a 3-foot cable with two adjustable weights, allowing technicians to fine-tune the float positioning and switching differential to prevent short-cycling. As a direct replacement for many standard liquid level controllers, the F59A-1 ensures automated, high-torque pump activation to protect facilities from flood damage.

• Dual-Voltage Compatibility: Operates seamlessly on both 120V and 240V circuits for versatile field application.
• DPST Switching: Provides robust on/off control, making it a reliable sump pump float switch replacement for heavy-duty motors.
• Adjustable Differential: The included 3' cable and weight system allow for customized water level settings to suit specific pit depths.
• Secure Installation: Equipped with a universal fixed mounting bracket to eliminate slippage and ensure consistent mechanical operation.
• Durable Enclosure: The NEMA 1 enclosure protects internal electrical contacts from dust and debris in damp mechanical rooms.

Is the Johnson Controls F59A-1 suitable for sewage ejector pumps?
This switch is specifically optimized for sump operation in clean water applications. For high-viscosity or sewage applications, consult the manufacturer's chemical compatibility charts.

Can this switch be used to fill a tank instead of drain a sump?
The F59A-1 is designed for direct-acting sump operation (contacts close on liquid rise). Standard configuration is for pump-down applications to prevent flooding.

What is the maximum electrical rating for the DPST contacts?
The F59A-1 is rated for standard 120/240 VAC industrial electrical service, making it compatible with most standard residential and light commercial liquid level control systems.

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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.