What is the definition of a wall mount humidity sensor? A wall mount humidity sensor is a device that is used to measure the relative humidity in a given area or room. The device is typically mounted to a wall with screws and is used to detect levels of moisture in the air. It is commonly used in homes and offices to monitor the humidity levels and ensure comfortable living conditions. The device usually has a digital display that shows the current humidity levels, as well as an alarm that goes off when the humidity levels exceed the desired range. The device typically has two parts, one part being the sensors and the other part being the main unit. The main unit is typically connected to a power source and has a range of settings for the desired humidity levels. The wall mount humidity sensor is a useful device for monitoring and controlling the humidity levels in a given space, ensuring comfortable living conditions and preventing the growth of mold and mildew.