The Watts Series FS10-C is a robust paddle-type flow switch designed for accurate liquid flow monitoring in commercial and industrial applications. It is well-suited for water systems, hydronic heating systems, air conditioning units, and various processing equipment. The flow switch can be wired as an automatic control or safety device, capable of starting or stopping a motor, or activating an alarm based on flow/no-flow conditions.

Key Features

• Reliable Construction: Features a beryllium copper paddle and a brass body, ensuring durability in demanding environments. An optional model (FS10-CL-SS) offers a stainless steel paddle and bellows for enhanced corrosion resistance.
• Flexible Installation: The switch is designed for easy installation in a standard tee fitting in either horizontal or vertical piping. It comes with a segmented paddle that can be adapted for pipe sizes from 1" to 3" (25-80mm), and includes an extended paddle for larger pipes up to 6" (150mm).
• Adjustable Settings: The switch provides both coarse and fine sensitivity adjustments to fine-tune the activation flow point. The switch assembly is independent and removable from the mounting adapter for convenient wiring without interference.
• Visual Indicator Option: The FS10-C-CL model features an indicator light integrated into the switch cover for easy local status monitoring.

Technical Specifications

• Maximum Working Pressure: 175 psi (12.1 bar)
• Maximum Fluid Temperature: 300°F (148.9°C)
• Switch Type: Single Pole, Double Throw (SPDT)
• Electrical Rating: Suitable for 120/240 VAC applications (specific ratings in manual)
• Enclosure: NEMA 1 (general purpose)
• Conduit Connection: Two electrical knockouts (1/2" NPT) on chassis sides
• Certifications: UL Listed

Applications

This flow switch is ideal for monitoring liquid flow in pump systems, boilers, chillers, heat exchangers, and other industrial fluid handling systems where reliable flow detection is required for equipment protection or process control.