Helium-Based Refractometry for Pressure Measurements in the Range 1–100 kPa

Zaccaria Silvestri (1) , Frederic Boineau (1) , Pierre Otal (1) , Jean-Pierre Wallerand (1)

1 LCM - Laboratoire commun de métrologie LNE-CNAM

This paper describes an alternative of pressure measurements based on a helium absolute refractometer at 532 nm. The Fabry-Perot cavity has been characterized from relevant parameters and the resolution in pressure of this new optical pressure sensor is lower than 0.2 Pa.

Keywords: Coefficient of thermal expansion; Fabry-Perot cavity; Pressure-induced distortion coefficient; Pressure sensor; Refractometry

Domains: Engineering Sciences [physics]

Zaccaria Silvestri, Frederic Boineau, Pierre Otal, Jean-Pierre Wallerand. Helium-Based Refractometry for Pressure Measurements in the Range 1–100 kPa. 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018), Jul 2018, Paris, France. ⟨10.1109/CPEM.2018.8501259⟩. ⟨hal-03911024⟩