Sensors of this sort comprise structural elements inducing an oscillating flow component transverse to a fluid flow direction and representative of {HEAD ~ a rate} of flow when {TAIL ~ the fluid} is flowing along the flow direction 
Sensors of this sort comprise structural elements inducing an oscillating flow component transverse to a fluid flow direction and representative of { HEAD ~ a rate } of flow when { TAIL ~ the fluid } is flowing along the flow direction
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH