Open-source sensor for measuring oxygen partial pressures below 100 microbars

Publishing date: 2018-12-20

Published on: PLOS ONE

summary: This nifty device measures partial pressure of oxygen in a similar manner to commercial devices, yet at substantially reduced cost. In a nutshell, a sinusoidally modulated LED excites a luminescent dye over time, while a photodiode picks up the spectrally shifted emission light from the dye. Depending on the oxygen around the dye, this emission is phase-shifted, meaning that the oxygen partial pressure can be computed directly from this shift. The system is impressively accurate, and comes with a neat design that includes both a screen and WiFi capability, meaning that many devices can be built and read-out remotely.

authors: Mihkel Pajusalu, Cauê S. Borlina, Sara Seager, Shuhei Ono, Tanja Bosak

link to paper: 10.1371/journal.pone.0206678

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