- freely available
Sensors 2010, 10(5), 4634-4642; doi:10.3390/s100504634
2. Materials and Methods
2.1. Photo Acoustic Spectroscopy Detection Method
2.2. Experimental Setup
2.3. Air Conveyance from the Tunnel to the Instrument
3. Results and Discussion
- Substantial time delays occur, when the measuring strategy is designed to switch between high and low concentration positions.
- It is recommended to plan the measuring strategy to allow a minimum of 12.5 to 25 minutes on each position. Even in this case a correction factor may be needed in order to obtain reliable results for further calculations.
- It is always recommendable to validate the instrument properties with respect to sensibility to variations in concentration levels before starting any data collection.
References and Notes
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|Gas||Filter||SIT (s)||Centre wavelength (μm)||Detection threshold (mg/m3)||Calibration range (mg/m3)|
|Carbon Dioxide (CO2)||UA0982||5||14.1||1.5||1.5–800|
|Dinitrogen oxide (N2O)||UA0985||5||4.5||0.03||0.03–5.45|
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