Title: Metrological validation of a new dTDLAS-Hygrometer
Authors: Bohlius, Henning, Physikalisch-Technische Bundesanstalt (PTB), Fachbereich 3.4, Analytische Chemie der Gasphase
Bubser, Florian, Physikalisch-Technische Bundesanstalt (PTB), Fachbereich 3.4, Analytische Chemie der Gasphase
Werhahn, Olav, Physikalisch-Technische Bundesanstalt (PTB), Fachbereich 3.4, Analytische Chemie der Gasphase
Deschermeier, Regina, Physikalisch-Technische Bundesanstalt (PTB), Fachbereich 3.4, Analytische Chemie der Gasphase
Ebert, Volker, Physikalisch-Technische Bundesanstalt (PTB), Fachbereich 3.4, Analytische Chemie der Gasphase
Biondo, Luigi, TU-Darmstadt
Wagner, Steven, TU-Darmstadt
Contributors: HostingInstitution: Physikalisch-Technische Bundesanstalt (PTB), ISNI: 0000 0001 2186 1887
Pages:7
Language:en
DOI:10.7795/810.20200430
Resource Type: Text / Presentation
Publisher: Physikalisch-Technische Bundesanstalt (PTB)
Rights: Download for personal/private use only, if your national copyright law allows this kind of use.
Relationships: IsNewVersionOf: DOI 10.7795/810.20200122
Dates: Available: 2020-04-05
File: Download File (application/pdf) 1.39 MB (1458225 Bytes)
MD5 Checksum: 733c39aade983db1c7547789533f89fb
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Keywords: Gas metrology ; moisture ; H2O ; hygrometry ; dTDLAS ; diode laser ; laser spectroscopy ; industrial processing ; drying ; EMPIR ; HIT
Abstract: Results of the collaborative study of TU-Darmstadt and PTB in the HIT project were presented at the final workshop at INRIM, Torino, Italy.

PTB has set up a system for the validation of dTDLAS-hygrom-eters which were developed by TU-Darmstadt within the frame-work of HIT. The calibration facility is designed to calibrate hu-midity in air measurement devices at temperatures up to 100 °C. The system was designed to perform validations and/or calibrations of a device under test like the dTDLAS-hygrometer from TU DA. Traceability was achieved by comparison to a pri-mary humidity standard via a reference chilled mirror hygrome-ter.

The developed dTDLAS hygrometer was shown to yield relative deviations of less than 5 % as compared to the reference value. This is nicely confirming its capability to be used as a transfer standard. Based on PTB’s validation result and on further vali-dation performed at INRIM for temperatures above 100°C the dTDLAS hygrometer could subsequently be applied success-fully at an industrial site within the project thus demonstrating the valuable capabilities of such dTDLAS systems for industrial applications.

The measurement approach of dTDLAS-hygrometers comply-ing with the TILSAM method 1 like the one from TU-Darmstadt in HIT is promoted by PTB 3.42.
Citation: Bohlius, Henning ; Bubser, Florian ; Werhahn, Olav ; Deschermeier, Regina ; Ebert, Volker ; Biondo, Luigi ; Wagner, Steven. Metrological validation of a new dTDLAS-Hygrometer, 2020. Physikalisch-Technische Bundesanstalt (PTB). DOI: https://doi.org/10.7795/810.20200430