20KG Volcanic Stone Load REF 90141016
ASPEN HYGROMETER
Hygrometer from a series of design accessories in aluminum and light-colored aspen wood.
Place your hygrometer in a completely dry sauna heated to 90°C (approx. 195°F). After about 90 minutes, the hygrometer will display the relative humidity (RH) at about 12%. Otherwise, calibrate the hygrometer so that the arrow points to 12%.
