Has any one used the KMC SSS-1001 flow sensors to retrofit pressure dependent vavs to pressure independant. They come in three lengths dpending on the inlet size of the vav. Clearly this sensor is reading velocity pressure (diff pressure) as designd. My question is this... How does this sensor compare to the flow cross sensors that come standard with newer independent vavs? When I install a digital controller and read diff pressure will this be a usable input?