The Johnson Controls F261KEH-V01C Flow Switch is a high-precision, inline low flow model engineered specifically for technical monitoring of nonhazardous fluids. Designed as a direct replacement for F61KD-3 and F61KD-3C models, this unit features a NEMA 3R enclosure, making it suitable for both indoor and outdoor installations where protection from rain and splashing water is required. It operates on a universal 24V-240 Vac range and utilizes a SPDT switch (Single-Pole, Double-Throw) to provide reliable liquid flow sensing in cooling or heating circuits. With 1/2" x 1/2" NPTF inlet and outlet connections and a Viton diaphragm, this switch is highly compatible with water, ethylene glycol, brine, and treated swimming pool water. It is rated for a maximum fluid pressure of 290 psig and maintains performance across fluid temperatures from -20°F to 250°F. This high sensitivity flow switch ensures your system shuts down safely if flow rates drop below 1.0 GPM, preventing critical equipment damage. Key Benefits Universal Compatibility: Serves as the modern direct replacement for F61KD-3, ensuring seamless integration into existing HVACR systems. Environmental Resilience: The NEMA 3R enclosure (IP43) provides robust protection for the internal SPDT switch in various ambient conditions. Low Flow Precision: Specifically calibrated for low flow HVACR application, actuating at rates less than 1.0 GPM. Chemical Resistance: Equipped with a Viton diaphragm, allowing for the safe handling of chlorinated or treated fluids. Versatile Pressure Range: Rated for systems with maximum fluid pressure up to 290 psig (20 bar). Common Questions What is the best replacement for the F61KD-3C flow switch? The F261KEH-V01C is the recommended technical successor, offering improved enclosure ratings and the same 1/2" x 1/2" NPT connections for direct installation. Can I use this flow switch for treated swimming pool water? Yes, the internal Viton diaphragm and copper alloy construction are designed to handle treated and chlorinated water without premature degradation. How do I wire the F261KEH-V01C for a cooling system? Using the internal screw terminals, the Red (Common) and Blue terminals are typically wired to open the circuit on a flow decrease, safely interlocking the compressor or chiller. Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
