Honeywell Thermal Solutions FSG L91B1035 Pressure Controller

The Honeywell FSG L91B1035 Pressure Controller delivers precise differential pressure control for steam, air, gas, and fluids. This differential-type device uses a rugged brass bellows operator to modulate pressure with reliable response and durable performance in demanding environments.

It features a 0 to 15 PSI operating range with a maximum line pressure of 25 PSI, and a differential range from 1.5 to 12 PSI. The 1/4 inch male threaded connection suits compact installations, and the unit is designed for modulating control of liquids, air, and non-corrosive gases across a variety of HVAC and process systems. Approved for safety and compliance, it carries UL, CSA, and Swiss RE approvals.

Electrical integration is straightforward with a screw-terminal connection and a 140-ohm single potentiometer modulation output, enabling smooth control aligned to system demand. Its compact footprint measures 4-1/2 inches wide by 2-7/8 inches deep by 6-7/8 inches high, making it easy to fit into tight control panels.

• Differential pressure controller with brass bellows operator
• Operating range: 0–15 PSI; max line pressure: 25 PSI
• Differential range: 1.5–12 PSI; media: steam, air, gas, fluids
• 1/4" male threaded connection; suitable for liquids, air, non-corrosive gas
• UL, CSA, Swiss RE approvals; screw-terminal electrical connection
• Modulation output: 140 Ohm single potentiometer; compact dimensions: 4-1/2" W x 2-7/8" D x 6-7/8" H