A hygrothermograph is a tool used to measure temperature and humidity levels in the air. There are a few different synonyms for the word hygrothermograph, including thermohygrometer, psychrometer, and hygrometer. A thermohygrometer is similar to a hygrothermograph in that it measures both temperature and humidity levels, while a psychrometer is a type of hygrometer that uses the principle of evaporation to determine humidity levels. Other synonyms for hygrothermograph include air thermometer, digital thermometer, and weather station. Regardless of the terminology used, these devices are essential for monitoring environmental conditions in a variety of settings, from scientific research laboratories to industrial manufacturing operations and beyond.