PROXIMITY SENSOR AND AUTOMATIC FAUCET

摘要

A proximity sensor (1) provided with a measurement distance determination unit (321) for determining whether the distance to a detection object is within a prescribed detection distance range, a light reception amount determination unit (322) for determining whether an amount of received light is greater than or equal to a light reception amount threshold, and a continuation determination unit (323) for determining whether a state in which a detection object is present is continuing, said light reception amount determination unit (322) being such that after it is determined that there is a detection state and water discharge starts, during the period in which the continuation determination unit (323) determines that the state in which the detection object is present is continuing, the light reception amount threshold is set to a lower value than the value before water discharge started.