Installing Your Paddle-Wheel Flow Sensor For best results, allow a straight run of pipe before and after the sensor after any bends, valves, or flow restrictions. Stated accuracy is not guaranteed unless the Signet installation fittings are used. The installation fitting ensures proper paddle depth and orientation. | In horizontal pipe runs with no air pockets or sediments present, mount the sensor/fitting in the 12 o'clock or 6 o'clock position. If sediment or air pockets are present, tilt the sensor/fitting at a maximum angle of 45° to avoid these obstacles. Vertical runs require upward flow. Pipes must be full. |  | | |