{TAIL ~ a hydrophobic, porous, oxygen permeable layer} positioned between said reagent layer and said {HEAD ~ support}, such that oxygen can permeate to said layer containing oxidase from both surfaces of said layer containing oxidase 
{ TAIL ~ a hydrophobic , porous , oxygen permeable layer } positioned between said reagent layer and said { HEAD ~ support } , such that oxygen can permeate to said layer containing oxidase from both surfaces of said layer containing oxidase
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH