Analytical Instrumentation, Methods & Materials
SOIL GAS-FLUX MEASUREMENT SYSTEM
Inventors: Bhuvana Krishnaswamy, Jingyi Huang, Francisco Arriaga, Christian Martinez, Hendri Winanto, Adam Nygard
Soil produces or consumes gases such as carbon dioxide, methane, nitrous oxide, ammonia, and oxygen through normal biological and geological processes. Current soil gas-flux measurement systems are expensive and can be difficult to deploy, greatly limiting their application for many important uses.
UW-Madison researchers have designed a low-cost soil gas-flux measurement system using gas-specific sensors that may be distributed among compact collection chambers. By eliminating the need for fluid communication to a central analyzer (through hoses or the like) and employing a low-mass vent door design, a practical wireless battery power system can be produced having low-cost and flexible deployment. These benefits increase the spatial sampling of the soil to offset potential loss of accuracy from the low-cost sensors and small area of the collection chamber.