Dual Fiber-Optic Cantilever Differential Photoacoustic Sensor

5.1 ppb trace detection

Employs dual-cantilever differential photoacoustic detection with multipass absorption enhancement, enabling highly sensitive dynamic monitoring of H₂S in an SF₆ background.

Zhao, Xinyu · Zhengzhi, Wang · Li, Chenxi · Wang, Heng · Qi, Hongchao · Guo, Min · Ma, Fengxiang · Chen, Ke

Analytical Chemistry 2024

Specifications

in SF background

{'zh': '5.1', 'en': '5.1'} ppb

equivalent absorption coefficient

{'zh': '9 × 10⁻¹⁰', 'en': '9 × 10⁻¹⁰'} cm⁻¹ W

gas flow allowed

{'zh': '250', 'en': '250'} sccm

and target gas

{'zh': '', 'en': '4.1'} m