Gems Sensors FS-500 Series Polypropylene Flow Switch, J-Box with 5-Amp Relay, Elbow, Shuttle Type, 0.25 gpm Flow Setting, 3/4" NPT Female Wetted Materials: Polypropylene, Viton, 316 Stainless Steel, PH 15-7 Mo Stainless Steel Electrical Termination: Junction Box w/ 6' PVC Cable Switch Type: SPDT (5A - 240VAC, 28VDC) Set Point Differential (Maximum): 0.2 Recommended Filtration: 100 micron