Flexit 110987 is an electromechanical room humidistat that measures relative air humidity for ventilation and dehumidification control. The housing carries the sensor element internally with a fixed cable and snap-on cover, mounted where room air can circulate freely. It provides a switching output based on relative humidity without support for BACnet, Modbus, KNX, or wireless protocols. Typical applications include bathrooms, utility rooms, and other spaces where humidity-driven fan or damper control is required.