Can the FFM100 monitor water flow?

Yes, The FFM100 can be used to monitor waterflow, however the FFM100 M-series sensors are not intended to be used for water flow applications. The  M-Series fuel flow sensors are compatible with fuel, lubricating oil, hydraulic fluid, or other clean petroleum based products and should not be used with any other fluid types. For details on adapting a water flow sensor to the FFM100 click on the following link: "I see that the FFM100 has a configuration called "Sensor:1-Phase"; what is this option used for?"