■ Introduction The FSF-YK series fow switch is a small fow switch specially designed for coal-to-electric heating system, which can measure small changes in fow in the pipeline. It converts the changes in the fow sensed into the pipeline into electrical signals, and the fow in the pipeline is automatically controlled by the actuator. It uses highly sensitive signal components to ensure that the fow switch has the characteristics of high reliability, high sensitivity and fast transient action. ■ Technical Parameters ● Ambient temperature: -20~+65°C ● Medium temperature: -20~+110°C ● Maximum fuid pressure: 1MPa ● Electrical rating : DC 100V 0.5A 10W ● Flow error: ±10 % ● Applicable medium: Does not erode plastic fuid ● Protection level: IP55