FS200P - 2" FS Series PVC Tee Flow SensorRain Bird FS200P 2" FS Series PVC Tee Flow Sensor Rain Bird FS Series flow sensors use impellers to sense flow and send flow rate data to central control or stand alone controller systems for precise and accurate flow monitoring. Rain Bird flow sensors are available with NPT and BSP ends. Rain Bird flow sensors enable you to capitalize on the advantages of Flow Management functionality from controllers and central control. Use Rain Bird Flow Sensors