Will BluMat Sensors work powered by a big res and small pump on a timer instead of gravity fed?

a "BluMat" irrigation system will do great! will give you a good accurate watering when moisture levels are low BUT make sure that it gets at least 20-30% runoff when it irrigates to avoid salt buildups. a simple pump on timer with controlled drip system would've got the job done (if you don't know your drip rate then collect and measure how much water it drips in a minute then set the timer accordingly) for ya since the BluMat seems quite expensive but if you ordered it might as well use it. Good luck and happy growing :)