The FS15LF is a low-flow liquid detection switch designed for use in pressurized liquid flow systems. It features a moving magnet and fixed reed switch mechanism with low flow restriction, constructed from acetal resin with a 15mm tube connection. The switch operates over a temperature range of -20°C to +85°C with a maximum operating pressure of 10 bar, and is WRAS approved for cold and hot water applications up to 60°C. The FS15LF has a must-operate flow rate of 0.90 liters/min (0.24 US gal/min) and a must-release flow rate of 0.25 liters/min (0.07 US gal/min), with electrical specifications including a maximum switching power of 25 VA at 240V AC or 120V DC with a maximum current of 0.6 A. This switch is ideal for water heating systems, circulation loops, and other liquid flow monitoring applications where low-flow detection is required.