Hygrometer and temperature and humidity chamber equipped with this hygrometer

摘要

The hygrometer has a constant heat quantity (qC) released to the external space (S2) and a heat transfer part (12) extending from the measurement space (S1) to the external space (S2) separated by the heat insulating part (100). And a heat release amount control unit (20, 120) for releasing heat from the heat transfer unit (12) to the external space (S2), and an arithmetic unit (32) for calculating the humidity (U) of the measurement space (S1) And comprising. In the heat transfer section (12), the computing device (32) is in a state where the amount of heat released from the heat transfer section (12) to the external space (S2) is constant by the heat release amount control section (20, 120). Using the relational expression based on the heat balance in the heat transfer section (12) when condensation occurs in the part (12a) located in the measurement space (S1), the heat transfer section temperature (te) and the measurement space temperature (t ) To calculate the humidity (U) of the measurement space (S1).