Honeywell Thermal Solutions FSG L404F1409 Pressure and Limit Controller

Meet the Honeywell Thermal Solutions FSG L404F1409 Pressure and Limit Controller, a reliable safety device for steam, air, and non‑corrosive fluids. With an adjustable subtractive differential and a diaphragm operator, it delivers precise control and repeatable limits across tough industrial environments.

Designed for durable performance, this unit supports an operating pressure range of 2 to 15 PSI and a differential range of 2 to 6 PSI, ensuring responsive shutdown and restart as pressure changes. The robust 1/4 inch female threaded connections simplify installation, with an option for surface mounting to fit compact control panels.

• SPDT 2‑circuit contact for flexible wiring and interfacing with safety circuits
• Adjustable subtractive differential and diaphragm operator for precise limit control
• Operating pressure 2–15 PSI; differential 2–6 PSI; compatible with air, steam, and non‑corrosive fluids
• UL and CSA approvals for trusted safety compliance
• 1/4 inch female threaded connections; auto recycle and Make R‑W on pressure rise; gray finish with clear cover for visibility

Mounting is simple with 1/4 inch female threaded or surface mounting options. Ideal for steam and air systems needing reliable limit control in a compact, rugged package.