Honeywell Thermal Solutions FSG L404F1243 Pressure and Limit Controller

The Honeywell Thermal Solutions FSG L404F1243 Pressure and Limit Controller delivers precise control for steam, air, and non-corrosive fluids. This robust pressure and limit controller features an adjustable subtractive differential and a diaphragm operator for reliable on-rise signaling and auto recycle action, backed by UL and CSA approvals for safety and compatibility.

Operating range and performance are engineered for tough boiler and process applications: 5–50 PSI operating pressure, 85 PSI maximum line pressure, and 6–14 PSI differential. It uses SPDT, two-circuit contacts with high current ratings at 120 VAC and 240 VAC, and connects via 1/4-inch-19 BSPT female threads. The unit is designed for steam, air, non-combustible gas, or non-corrosive fluid media and operates from -35 to 150°F. A clear plastic cover protects the internals while a gray finish complements industrial panels. Mounting options include 1/4-inch threaded or surface mount.

• Adjustable subtractive differential for precise control
• Diaphragm-operated pressure sensing with snap-action make/break
• SPDT two-circuit contacts rated for heavy duty applications
• 5–50 PSI operating range; 85 PSI max line pressure; 6–14 PSI differential
• 1/4" BSPT female thread connections; surface or threaded mounting
• Suitable for steam, air, non-combustible gas, and non-corrosive fluids
• UL and CSA approved for safety and compliance
• Operates from -35 to 150°F