A transportable refractometer for assessment of pressure in the kPa range with ppm level precision

C. Forssén, I. Silander, D. Szabo, G. Jönsson, M. Bjerling, Thomas Hausmaninger, O. Axner, M. Zelan

Research output: Contribution to journalArticleScientificpeer-review

9 Citations (Scopus)


A transportable refractometer for assessment of kPa pressures with ppm level precision is presented. It is based on the GAs MOdulation Refractometry (GAMOR) methodology, making it resistant to fluctuations and drifts. At the National Metrology Institute at RISE, Sweden, the system assessed pressures in the 4.3 - 8.7 kPa range with sub-ppm precision (0.5 - 0.9 ppm). The system was thereafter disassembled, packed, and transported 1040 km to Umeå University, where it, after unpacking and reassembling, demonstrated a similar precision (0.8 - 2.1 ppm). This shows that the system can be disassembled, packed, transported, unpacked, and reassembled with virtually unchanged performance.
Original languageEnglish
Pages (from-to)287-292
JournalActa IMEKO
Issue number5
Publication statusPublished - Dec 2020
MoE publication typeA1 Journal article-refereed


This project (QuantumPascal, 18SIB04) has received funding from the EMPIR programme co-financed by the Participating States and from the European Union's Horizon 2020 research and innovation programme. The authors acknowledge support from the Swedish Research Council (VR) (Project No. 621-2015-04374); the Umeå University Industrial Doctoral School (IDS); the Vinnova Metrology Programme (Project Nos. 2018-04570 and 2019-05029); and the Kempe Foundations (Project No. 1823, U12).


  • Pressure
  • Refractometry
  • Transportable


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