Consequently, erroneous flow readings due to diffusion of {HEAD ~ a lighter gas} through {TAIL ~ the soap film} are eliminated 
Consequently , erroneous flow readings due to diffusion of { HEAD ~ a lighter gas } through { TAIL ~ the soap film } are eliminated
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH