Abstract: Devices for indicating when a water stream at some temperature flowing through a plumbing fixture is comfortable for at least one user to physically contact. Devices include at least a control unit, a temperature sensor, and an output device. The temperature sensor senses a temperature representative of the water stream. The control unit compares the temperature representative of the water stream to a preset temperature or range of temperatures representative of the water stream being comfortable for some user to physically contact. The output device affirmatively indicates to users that the water stream is comfortable once the sensed temperature representative of the water stream matches or is within the preset range of representative temperatures. A user interface is provided in some embodiments. Abstract is provided only for searching purposes, and is not intended to narrow the scope of the present invention as defined by the attached claims in any way.