HYGROMETER AND CONSTANT-TEMPERATURE/CONSTANT-HUMIDITY CHAMBER PROVIDED WITH SAME

摘要

A hygrometer is provided with: a heat transmission section (12) that extends toward an outside space (S2) separated from a measurement space (S1) by a thermal insulation section (100); a radiant heat quantity control section (20, 120) that emits heat from the heat transmission section (12) to the outside space (S2), so that a heat quantity (q_C) emitted to the outside space (S2) is constant; and a computation device (32) that computes the humidity (U) of the measurement space (S1). With the heat quantity emitted from the heat transmission section (12) to the outside space (S2) made constant by the radiant heat quantity control section (20, 120), the computation device (32) computes the humidity (U) of the measurement space (S1) from the heat transmission section temperature (t_e) and the measurement space temperature (t), by using a relationship based on the heat balance in the heat transmission section (12) when condensation occurs at a site (12a) within the measurement space (S1) in the heat transmission section (12).