FD-XS20 | Keyence Ultrasonic Clamp-On Flow Sensor Head, 0–20 L/min, IP67, Non-InvasiveDescription The Keyence FD XS20 (part number FD XS20) is a compact micro flow sensor head designed for use with the FD X Series ultrasonic clamp on flow sensors. It accurately measures liquid flow in metal and plastic pipes, supporting a maximum rated flow of 20 L min. The FD XS20 provides high repeatability and durability, making it suitable for monitoring water, oil, adhesive, and chemical fluids in industrial automation and process control