Sulfur dioxide detector device embodied by using S02-oxidant bioagent

A sulfur dioxide detector device using SO.sub.2 -oxidant bioagent, the detector device comprising:

• a horizontally arranged sensor housing;
• an oxygen concentration sensor removably disposed within the sensor housing;
• a bio-membrane concentrically located at one end of the oxygen concentration sensor, the bio-membrane including an SO.sub.2 -oxidant bioagent provided between an immobilized membrane and a gas permeable membrane;
• the oxygen concentration sensor having an oxygen electrode placed in contact with the immobilized membrane of the bio-membrane;
• a dish-shaped cell formed with a horizontally extending axis, and having an open end which is in contact with the gas permeable membrane of the bio-membrane so that SO.sub.2 -laden solution supplied to the cell oxidizes sulfurous acid into sulfuric acid as SO.sub.2 permeates through the bio-membrane so as to change an output from the oxygen concentration sensor depending on an amount of SO.sub.2 ;
• and
• an inlet hole and an outlet hole each formed on a sidewall of the cell in diametrically opposed relationship, the outlet hole being always located directly above the inlet hole so as to quickly drain foam formed when the SO.sub.2 -laden solution is supplied to the dish-shaped cell through the inlet hole and drained from the outlet hole, the inlet and outlet holes being directed toward the gas permeable membrane to make an angle with the axial direction of the cell of less than 90 degrees.