PURPOSE: To simply, objectively and concretely know the degree of sanitation of tableware to be used by arranging a bacteria detecting biosensor to the proper place of the surface of a sheet like substrate having flexibility and subjecting the output data of the biosensor to judging processing.
CONSTITUTION: For example, when the degree of sanitation of tableware B is checked, the bacteria detecting biosensor 2 arranged to the proper place of a sheet like substrate 1 is rubbed on the inner surface of the tableware B in a contact state. In this case, since the part where the biosensor 2 is positioned has flexibility, the biosensor 2 smoothly corresponds to the curved surface of the tableware B to come into contact therewith. This E coli data is read by an IC circuit part 3 and set against the fuzzy rule of a memory to perform fuzzy judgement. This is, a steady state is inferred from the initial value of the biosensor 2. This inference result is displayed on a display device 4. The quantitative display of this check degree is performed as display in color.
SUGIYAMA SADAO
UENO YASUMASA
OTA HIROBUMI
KASAHARA SEIICHI
