F59A-1C Johnson Controls Liquid Level Control

Overview

The Johnson Controls F59A-1C is a reliable, weight-operated liquid level switch designed for automated control in sump and tank applications. It features double-pole, single-throw (DPST) contact operation factory-adjusted to close contacts on liquid rise to effectively handle rising liquid levels. The switch can be rotated 180 degrees in the field to adjust for open tank or tank filling operations where contacts must open on a liquid rise.

Features

• DPST (Double Pole, Single Throw) switching action for flexible circuit integration.
• Fixed mounting bracket that can be field-reversed and remounted on the opposite side.
• High-force precision contact block factory set and sealed for long-term reliability.
• Submersible-ready weights capable of operation in mild acids, alkalies, oils, and water.
• Flexible operations supporting both sump level control and open tank filling configurations.

Specifications

• Brand: Johnson Controls
• Model: F59A-1C
• Electrical Rating: 1 HP at 120-240 VAC, 1/4 HP at 32 VDC
• Switching Style: Weight-operated switch lever
• Mounting: Fixed mounting bracket
• Cable Length: 40-inch plastic cable
• Enclosure Rating: NEMA 1 indoor general-purpose case

Applications

• Monitoring and controlling liquid levels inside sumps, basins, and drainage pits.
• Automated commercial and industrial pump operations to prevent flooding and overflow conditions.
• Open tank filling and storage reservoir management using field-inverted setup.
• General liquid monitoring setups requiring chemical tolerance to mild acids, alkalies, or oils.