Abstract: The functions of the odor (smell, odor, reek etc. have the same meaning) detecting process with the same raw water includes two functions, that is: a function of detecting an odor by a downward substitution method that substitutes, in a sensor portion, heavy odorous substances to a bottom portion and light normal air to an upper portion by a four-stage humidity removal process in which high humidity air which is first generated in a vaporizing portion is made into medium-humidity air with a dehumidifying portion, which is then made into low-humidity air with a constant-temperature portion, and then two or more types of sensor elements are exposed to dry air at the sensor portion; and a second function of detecting poison using fish in a monitoring water tank, which is detected with another process such as surveillance camera, image processor, periphery controller and the like. The above two functions are compactly incorporated as an integrated type into a single cabinet.

Abstract: Provided is a small and simple automatic water quality surveillance apparatus that can automatically sense toxic substances, oil, mold, or the like contained in raw water. The apparatus includes an odor-sensing water tank through which the raw water circulates. The tank further includes an odor sensor sensing an odor, such as an oily odor, a mold odor, and so on. Upon having sensed the toxic substances, oil, mold, or the like, an alarm is automatically issued thereby.