McDonnell & Miller FS1 High Sensitivity Liquid Flow Switch

McDonnell & Miller FS1 High Sensitivity Liquid Flow Switch is an in-line flow switch designed for precise monitoring of liquid flow. This 1/2 inch nominal size unit features end connections that are threaded x threaded, making installation straightforward in standard piping systems.

Built for reliable performance in heating, cooling, and boiler circuits, the FS1 offers an adjustable sensitivity screw for fine-tuning response and an ample flow capacity to suit a variety of liquids. It operates across a broad temperature range (32 to 225 Deg F) and withstands pressures up to 100 PSI, while remaining UL listed for both Canada and the US.

• High flow capacity
• Sensitivity adjustable screw
• Type: In-Line; Nominal Size: 1/2 inch
• End connections: Threaded x Threaded
• Flow rate: 0.41–1.81 GPM (Flow); 0.24–1.28 GPM (No Flow)
• Temperature rating: 32–225 Deg F
• Pressure rating: 100 PSI
• UL listed (Canada and US)