RFS Type Electronic Flow Sensor. RotorFlow® Switches build an extra level of reliability and protection into your equipment. By principle of operation, the rotor cannot be deceived into indicating a positive flow situation when no flow actually exists. Once set to a desired actuation point, RotorFlow® switches to a no-flow condition when the rotor stops for any reason. Features and Benefits. Combines visual confirmation of flow with dynamic, electronic switch operation. Easy, adjustable switch point calibration: a local LED signals when setpoint is reached. Product Application Information. Semiconductor processing equipment. Lasers. Medical equipment. X-Ray and other high-power tubes. Robotic welding equipment