公开(公告)号：US5206170A

公开(公告)日：1993-04-27

申请号：US769534

申请日：1991-10-01

申请人： Takeshi Sato ,  Nobuko Kubo ,  Hirofumi Akano ,  Yoshiya Kawamura ,  Shigesada Iijima

发明人： Takeshi Sato ,  Nobuko Kubo ,  Hirofumi Akano ,  Yoshiya Kawamura ,  Shigesada Iijima

IPC分类号： C12Q1/00 ,  G01N33/00

CPC分类号： C12Q1/005 ,  C12Q1/001 ,  G01N33/0042 ,  Y10S435/817

摘要： In a sulfur dioxide detector using SO.sub.2 -oxidant microbes, a bio-membrane is located at one end of an oxygen concentration sensor, the bio-membrane containing the SO.sub.2 -oxidant microbes between an immobilized membrane and a gas permeable membrane. The sensor has an electrode in contact with the immobilized membrane. A dish-shaped or frusto-conical cell has an open end which is in contact with the gas permeable membrane so that SO.sub.2 -laden solution supplied to the cell causes sulfurous acid to oxidize to sulfuric acid as the SO.sub.2 permeates through the bio-membrane so as to change an output from the sensor. An inlet and outlet hole are formed on a sidewall of the cell. The outlet hole is located to be always directly above the inlet hole so as to drain foam formed when the SO.sub.2 -laden solution is supplied to the cell through the inlet hole and drained from the outlet hole.