Greisinger gfth 95 digital hygrometer and thermometer greisinger gfth 95 p the greisinger gfth 95 is a digital hygrometer and thermometer that is able to take quick response humidity and temperature measurements it can be used in edp rooms museums galleries churches office complexes workshops storage rooms swimming baths private buildings greenhouses for refrigeration engineering air conditioning and building sites or for inspectors rendering expert opinions etc p p with the a