Exemplary embodiments of the present disclosure include devices for monitoring and indicating the completion of eradication of a pest infestation in a space in which heating is utilized for eradication. In an exemplary embodiment, a device includes a sensor configured to sense temperature proximate the device, and a visual indicator configured to provide indication of status. The device further includes a processor that is connected to the sensor and visual indicator. The processor is configured to determine whether the sensed temperature exceeds the MINIMUM LETHAL TEMPERATURE, and configured to determine occurrence of completion of a minimum heating duration required for eradication in which the sensed temperature exceeds the MINIMUM LETHAL TEMPERATURE. The processor is further configured to activate the visual indicator subsequent to completion of the minimum heating duration, to thereby provide visible indication that the minimum heating duration for eradication of a pest infestation has elapsed.