Gas sampling with controlled humidity
AssigneeCalyx, Inc.
InventorsBenson Fan, Po-Jui Chiu, Chun-Yi Leu, I-Ting Chen, Ming-Yuan Tsai
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Abstract
A sensor system (100) or a sensing method minimizes the loss of aroma chemicals or other analytes in a sample gas while controlling the temperature and humidity of the sample gas. The system (100) may employ a humidifier (120) that adds water vapor to sample gas to provide a known water content, e.g., a saturated humidity at a known temperature. A sensing unit (130) may accurately measure the composition of the sample gas having a known water content, e.g., at a higher known temperature.
Claims12
A gas sensor comprising:
- a humidifier configured to add water vapor to a sample gas;
- a first temperature control system configured to receive the sample gas from the humidifier and to control a first temperature of the sample gas from the humidifier;
- and
- a sensing unit measuring the sample gas while the sample gas is at the first temperature and includes the water vapor that the humidifier added.
A process for sensing one or more chemicals in a sample gas, the process comprising:
- filtering particulates and water droplets from the sample gas;
- adding water vapor to the sample gas to provide the sample gas with a target relative humidity at a first temperature;
- and
- measuring the sample gas with the water vapor added, the measuring sensing presence or levels of the one or more chemicals in the sample gas.
Dependencies are inferred from the claim text.