Tfa digital thermometer hygrometer tfa 30 5027 01 p this digital thermometer hygrometer from tfa has been designed for the control of interior temperature and humidity of air for a clean environment manufactured with an ultra flat design comfort level max min function and high gloss surface p p readings include br temperature indoor 0 to 50 deg c 32 to 122 deg f br humidity indoor 20 to 95 p tfa digital thermometer hygrometer