One aspect of the invention is that it provides an improved phase detector for {HEAD ~ use} in {TAIL ~ a vortex shedding fluid flow sensor} 
in
One aspect of the invention is that it provides an improved phase detector for { HEAD ~ use } in { TAIL ~ a vortex shedding fluid flow sensor }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL