Fuel Flow Sensor 8-10 LPM/2.1-18.5 GPMWhen fluid passes through the sensor, the rotors turn. Magnets which are located in the rotors will pass across sensors in the sensor circuit board. Pulses from these sensors are transmitted to the FFM100 which performs flow rate calculations based on the received pulses.Specifications:Construction: Housing Material AluminumPort Size: 3/4 NPT FemaleMaximum Viscosity: 1000 cPsStrainer Size: 60 Mesh (If not already installed after fuel filter)WARNING: This product can expose you to chemicals including NICKEL (METALLIC) which is known to the State of California to cause cancer. For more information go to P65Warnings.ca.gov.