This therma-hygrometer simultaneously displays the humidity and temperature in addition to indicating and recording the max and min readings. The therma hygrometer measures temperature and humidity over the range of -20 to +70°C and 20 to 99% RH via the internal sensors.

Using the external temperature sensor the range is extended to -50 to +70°C.

The hygrometer features a frost alert alarm that will sound when the external remote temperature probe indicates the temperature is 0°C or below. This feature is ideal for frost/freeze alert in horticulture and similar.