The McDonnell & Miller 4148 is a 1-inch SPDT general purpose flow switch featuring a single moving actuator (SMA) in a snap action design with a built-in check valve. Compatible with all GSS-Series instruments, it includes two NEMA 5-15R AC power inlets, one NEMA 5-15P AC power outlet, and one dry DC output with screw terminals for versatile installation.
Engineered for reliable performance, the 4148 incorporates a heat and corrosion resistant ceramic globe that maintains consistent pressure, making it ideal for demanding industrial and commercial fluid monitoring applications where dependable flow detection is critical.