Technology

PhotoAcoustic Spectroscopy

 

Our patented photoacoustic technology was first developped by the Groupe de Spectroscopie Moléculaire et Atmospherique at the University of Reims Champagne Ardennes

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Based on the Helmholtz resonant cell principle, the AEROVIA Photoacoustic cell expands and pushes the boundaries of low concentration detection.

Based on a simple and robust principle, this technology is applicable to all fields of trace gas detection.

Selected Relevant Publications

Photoacoustic Detection of Methane in Large Concentrations with a Helmholtz Sensor: Simulation and Experimentation

New improvements in methane detection using a Helmholtz resonant photoacoustic laser sensor: A comparison between near-IR diode lasers and mid-IR quantum cascade lasers

AEROVIA's Technology Specificities

  • New Generation Technology with an Unique Patented design
  • High Selectivity – High Sensitivity
  • Interference-free Direct Measurements
  • Linear dynamic response (ppb – %)
  • Routine measurements over 5 orders of magnitude (ppb – %) with one calibration
  • Zero background technology (minute drifts over time)
  • No need for lengthy signal integration
  • Atmospheric pressure measurements

Insensitive to particulates in stream

Very low maintenance and cost of ownership

Insensitive to temperature changes

Robust and straightforward technology

What is photoacoustic spectroscopy (PAS)?

Phenomenon based on the absorption of Infra-red radiations by molecules and generation of pressure waves which can be collected by a microphone.

How can such a selectivity of the molecules be reached?

The photoacoutic (PA) platform is based on a the principle of a Helmholtz resonant cell combined with powerful quantum cascade lasers. The PA cell has resonant modes which result in a huge amplication of the sound wave when the optical excitation is at such frequency. (for more information about resonant amplication).

Why is it a direct method measurement?

direct measurement method