Abstract

In this paper, we investigate the effect of partial pressure and concentration of acetone gas using a micro polydimethylsiloxane (PDMS) curved diaphragm optical fiber sensor. To study the effect of acetone concentration, the swelling effect of PDMS is studied with Fabry Perot optical fiber sensor. Increasing liquid-phase leads to increase the partial pressure. To study this behavior, firstly the pressure sensitivity of proposed sensor is studied and consequently, based on the pressure calibration curve, the increased partial pressure due to different acetone concentration is experimentally calculated. Presented sensor demonstrates acetone concentration sensitivity of 1.102 ×10⁻⁴ nm/ppm in the range of 0 to 7838 ppm, and pressure sensitivity of 55pm/mBar in the pressure range 0-50 mBar. Considering our interrogation unit resolution, minimum detectable concentration and pressure are 22 ppm and 0.05mBar.

© 2018 The Author(s)