Separating the solid electrolyte layer 58 from species selective electrode 50 is {TAIL ~ an insulating layer} 60 having a section 54 including an opening pattern 66 and {HEAD ~ a dense or solid section} 55 
Separating the solid electrolyte layer 58 from species selective electrode 50 is { TAIL ~ an insulating layer } 60 having a section 54 including an opening pattern 66 and { HEAD ~ a dense or solid section } 55
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH