I would say in general we likely won't support it at this time. Our firmware can only handle sensors that output a frequency proportional to flow, whereas your sensor sounds like a pulse output type. Those create a pulse signal based on usage it has seen in the last several seconds (e.g. 5 pulses equals 5 gallons). I believe the firmware could be updated to include support for that type of sensor, but I don't think that feature is in the road map at this time.
Would you happen to know the actual model number of the sensor? I can look it up and be more certain.
Thank you and hope to hear back from you!