Abstract: A faucet apparatus which is capable of, even when a first spouting mode is adapted to be executed when a detection sensor detects an object, causing function water that has an antibacterial effect or bacteria removing effect to be spouted to a detected object without causing tap water by the first spouting mode to be spouted, so that the antibacterial effect or bacteria removing effect can be caused to effectively work on the object. A controller of the faucet apparatus of the present disclosure comprises the first spouting mode and a second spouting mode, and the controller is further provided with a second spouting mode prioritization function of, even if the detection sensor is into a detection state, performing control not to execute the first spouting mode while the second water mode is executed.

Abstract: In an automatic faucet having a hand sensor S to start and stop discharging water automatically, only hands can be detected accurately without detecting a washbowl (chinaware) and water stream erroneously. The sensor S comprises a light emitter and a light receiver. The directional axis d of a detection region (in which the light emitting region of the light emitter and the light receiving region of the light receiver are overlapped with each other) intersects the discharged water stream, and further the intersection angle between both is adjusted less than 70 degrees, irrespective of the flow rate of the discharged water. The reflected light levels detected by the light receiver are sampled periodically to calculate an average value and a variance value on the basis of at least eight most updated sampled data. Water discharge is started and stopped on the basis of the calculated average value and the variance value.

Abstract: In an automatic faucet having a hand sensor S to start and stop discharging water automatically, only hands can be detected accurately without detecting a washbowl (chinaware) and water stream erroneously. The sensor S comprises a light emitter and a light receiver. The directional axis d of a detection region (in which the light emitting region of the light emitter and the light receiving region of the light receiver are overlapped with each other) intersects the discharged water stream, and further the intersection angle between both is adjusted less than 70 degrees, irrespective of the flow rate of the discharged water. The reflected light levels detected by the light receiver are sampled periodically to calculate an average value and a variance value on the basis of at least eight most updated sampled data. Water discharge is started and stopped on the basis of the calculated average value and the variance value.