Abstract
A compact, portable and rechargeable sensor platform based on quartz-enhanced photoacoustic spectroscopy (QEPAS) was demonstrated for the sensitive detection of carbon monoxide (CO). The acoustic detection module and the circuit components were both integrated which formed a sensor system with a weight of 3.2 kg and dimensions of 250 × 250 × 50 mm 3 . Water vapor was added to the gas mixture in order to accelerate the vibration translation rate of CO molecules and improve the CO-QEPAS signal performance. An Allan deviation analysis was performed to assess the long-term performance of such a sensor system. For an integration time of 800 s, a minimum detection limit (MDL) of 21 ppb was obtained. To demonstrate the practical application of the reported compact and portable QEPAS sensor, a continuous measurement of CO from the combustion of three kinds of burning materials was performed.
| Original language | English |
|---|---|
| Pages (from-to) | 129-133 |
| Number of pages | 5 |
| Journal | Optics and Laser Technology |
| Volume | 115 |
| DOIs | |
| State | Published - Jul 2019 |
Keywords
- Compact CO sensor
- QEPAS
- ppb-level detection
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