Signet 515 Rotor-X-Paddlewheel Flow Sensor Simple to install with time-honored reliable performance, the output signal is a sinusoidal frequency capable of driving a self-powered flow meter (model 3-5090). This sensor can be installed in up to 36 inch pipes using Signet’s custom fittings to seat the sensor to the proper insertion depth into the process flow. Features: Housing Material: Polyproplene Shaft Material: Titanium Rotor: Black PVDF Select Pipe Size Above P51530-P0 - For pipe size 0.5 to 4 P51530-P1 - For pipe size 5 to 8 P51530-P2 - For pipe size 10 and up