1/2" 3/4" 1" 1-1/2" 2" Water Flow Sensor 1.75MPa Hall Sensor Turbine Flowmeter DC5~18V Used To Measure The Flow Of The Medium 1/2" 3/4" 1" 1-1/2" 2" Water Flow Sensor 1.75MPa Hall Sensor Turbine Flowmeter DC5~18V Used To Measure The Flow Of The Medium. Sale price : $10.00 Category : Home Improvement