Abstract: A work suit having a lifesaving function is provided where the work suit is made of two or more sheets of fabric, at least one variable contact tube keeping air in an amount smaller than a maximum capacity is formed in the uppermost part of a side of the work suit that corresponds to the girth of the body of a wearer, and when the variable contact tube gets into water, air in a lower portion is moved up by water pressure such that the thickness of an upper portion changes to the thickness when the variable contact tube is fully filled with air, so the variable contact tube come is in close contact with the body of the wearer.

Abstract: A dissolved carbon monoxide sensor includes an electrode and a carbon monoxide dehydrogenase fixed on the electrode. According to this configuration, the dissolved carbon monoxide sensor directly detects a dissolved carbon monoxide concentration in a solution by an enzyme reaction of the carbon monoxide dehydrogenase.