Xylem FS8-WJ General Purpose Liquid Flow Switch with BSPT Threads

The Xylem FS8-WJ (McDonnell & Miller brand, part number 120602) is a rugged general-purpose liquid flow switch designed for applications requiring NEMA 4X environmental protection with BSPT (British Standard Pipe Thread) international connections. This weatherproof flow switch is ideal for commercial HVAC, industrial process control, and hydronic systems where reliable flow detection is critical.

Key Features:

• 1" BSPT (British Standard Pipe Thread) connection for international applications
• NEMA 4X rated enclosure - water-tight, dust-tight, and corrosion resistant
• Sealed Monel bellows construction for durability and long service life
• Single pole, double throw (SPDT) snap switch for versatile control
• Four stainless steel paddles included: 1", 2", 3", and 6" (25, 50, 80, and 150mm)
• Adjustable sensitivity screw for easy flow rate calibration
• Fits pipe sizes from 1" to 6"
• Maximum operating pressure: 160 PSI (11.3 kg/cm²)
• Temperature range: 32°F to 225°F (0°C to 107°C)
• Switch rating: 7.4A at 120V, 3.7A at 240V

The FS8-WJ is engineered for applications with environmental exposure or harsh conditions. The sealed Monel bellows and stainless steel paddle construction ensure resistance to corrosion and wear. The adjustable sensitivity allows precise calibration for various flow rates and pipe configurations. This model is particularly suited for international installations requiring BSPT threading standards.