The TE Connectivity FS-02 is a robust flow switch engineered for reliable detection of liquid (water) or gas (air) flow in industrial systems. Utilizing a dependable reed switch mechanism, the FS-02 is a SPST (Single-Pole, Single-Throw) device that remains Normally Open (N/O) and closes when a preset flow rate is achieved. This makes it an ideal component for flow monitoring, level sensing, and pump protection applications.

Core Specifications

• Switch Type: SPST, Normally Open (Reed Switch), closes with flow.
• Maximum Switching Capacity: 1 A, 200 VDC / 250 VAC, 40 W max.
• Switch-on Flow Rate: 1.0 L/min (for water).
• Maximum Operating Pressure: 10 bar (1 MPa).
• Media: Water (primary), also suitable for air/gas flow detection.
• Mounting: 3/4" BSP male and female threads. Installation is vertical, with flow direction upward.
• Electrical Connection: 1.0 meter of double-insulated PVC cable (0.5mm², grey outer, blue/brown inner).
• Mechanical & Environmental Ratings: Shock resistance up to 50g, vibration up to 35g, IP65 ingress protection.

Materials and Construction

The FS-02 is built with a rugged, high-grade Noryl (modified polyphenylene ether) housing and shuttle, known for its strength, chemical resistance, and low moisture absorption. The reed switch contacts are made of Ruthenium for reliable performance. This robust construction, compliant with UL 94-HB flammability standards, ensures long-term durability in demanding conditions.

Operating Environment

The FS-02 operates reliably over a wide temperature range of -30°C to 85°C (-22°F to 185°F), making it suitable for diverse industrial environments. It is UL listed and resistant to weak inorganic acids, alkalis, alcohols, and oils, further enhancing its versatility.

Applications

Ideal for a variety of industrial applications, including leak detection in water systems, flow sensing for mains water control, protection of cooling systems and circulation pumps, and general flow or fill level detection.