WMT.HT.1021 Wall Mounted Humidity and Temperature Transmitters are designed to measure humidity and temperature values (0 ... 100% RH / -20 ... + 80 C)  and create outputs as 0-10V, 2-10V, 0-20mA, 4,20mA signals. WMT.HT.1021 Wall Mounted Humidity and Temperature Transmitters are used in many applications such as air handling units, hygienic air conditioners, pool dehumidifiers, greenhouses, storage areas, laboratories and data centers where humidity and temperature are monitored or controlled.