Xylem-McDonnell & Miller FS4-3D 1 Inch Flo Sw.W/2-Spdt Sw.#114550

The Xylem-McDonnell & Miller FS4-3D is a unique 1-inch flow switch designed to efficiently monitor and control liquid flow in a variety of HVAC systems. Its unique paddle and spring system senses fluid movement and activates two separate single-pole, double-throw (SPDT) switches for precise control over linked devices like burners, pumps, and alarms. This switch provides universal integration and customizable sensitivity for customized flow management, making it compatible with popular HVAC brands such as Watts, Johnson Controls, and Taco. Because it is made of Monel bellows and stainless steel bearings, it is extremely durable and resistant to corrosion, which makes it a great option for harsh settings. With the ability to detect low-flow circumstances, prevent dry starts, and optimize pump performance, the FS4-3D ensures dependable flow management and operational assurance for your HVAC system.