McDonnell & Miller FS1-W

McDonnell & Miller FS1-W is a 1/2" inline high-sensitivity flow switch designed for rugged industrial installations. The unit features a NEMA 4X enclosure that shields its sensing electronics from moisture, dust, and corrosion, ensuring durable operation in demanding environments.

Model 113601 provides dependable flow detection with fast response to changes in liquid flow, enabling precise control of pumps, fans, and interlock circuits. The compact inline form simplifies mounting in tight piping spaces, while the robust electrical performance supports reliable monitoring in a wide range of liquid systems.

• 1/2" inline design for straightforward installation in standard piping.
• High-sensitivity flow sensing enables rapid, accurate detection at low flow.
• NEMA 4X enclosure offers weatherproof and corrosion-resistant protection.
• Model 113601 part number for ordering and compatibility.

Whether upgrading existing equipment or designing a new control system, FS1-W delivers reliable flow status signals that help improve safety, efficiency, and uptime.