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Online veröffentlicht: 07. März 2008
Seitenbereich: 22 - 24
DOI: https://doi.org/10.2478/v10048-008-0006-y
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Water vapour density inside the mass comparator enclosure is a critical parameter whose fluctuations during mass weighing can lead to errors in the determination of an unknown mass. To monitor them, a method using DFB laser diode in the near infrared has been proposed and tested. Preliminary results of our observation of water vapour sorption and de-sorption processes from the walls and the mass standard are reported.