The D'Addario humidity and temperature sensor is a precision hygrometer designed to digitally indicate precise relative humidity levels ranging from low (less than 20%) to 99%. Temperature is displayed in degrees Fahrenheit or degrees Centigrade, ranging from -32° F to 122° F (-35° C to 50° C). The HTS includes a programmable setpoint, as well as a memory function that shows the date/time of the highest and lowest temperature/humidity levels to which the instrument has been exposed. An essential tool for monitoring your instrument's environment.