FSU34LF is a low-flow detection switch designed for use in liquid flow systems at pressures up to 10 bar and temperatures up to 85°C. The switch features a moving magnet and fixed reed switch mechanism with a 3/4" NPT thread connection, NSF-approved acetal construction, and a 10" (25 cm) PVC-insulated cable. It operates with a must-operate flow rate of 0.47 US gal/min (1.75 liters/min) and a must-release flow rate of 0.20 US gal/min (0.75 liters/min), with electrical ratings of 240 V AC maximum switching voltage, 120 V DC maximum, and 0.6 A maximum switching current at 25 VA. The switch is ideal for HVAC systems, water treatment applications, and other liquid flow monitoring systems where low flow detection and NSF 61 approval are required.