HUMIDITY-DEPENDENT-MASS MEASUREMENT DEVICE AND HUMIDITY-DEPENDENT-MASS MEASUREMENT METHOD

摘要

A humidity-dependent-mass measurement device (1) includes: a thermostatic chamber (11) defining an interior space capable of containing a sample, having a through hole, formed in the ceiling and communicating between the interior space and outside, such that an atmosphere of the interior is maintained at a determined temperature and humidity; a balance (12) supported above the thermostatic chamber (11); a measurement tool for suspension from a weighing pan supporter of the balance (12), insertion through the through hole of the thermostatic chamber (11) without contacting an inner circumferential surface of the through hole, and holding the sample in the interior of the thermostatic chamber (11); a cover box (13) including an air inlet port and an air outlet port in a side surface, the cover box (13) containing therein a portion of the measurement tool between the thermostatic chamber (11) and the balance (12) in a state such that the measurement tool is suspended from the weighing pan supporter without contacting the cover box (13); and a dry air supplier (14) for causing dry air at or below a specified humidity to flow into the cover box (13) from the inlet port.