More recently our lab has begun exploring the use of low-cost VOC sensors for the quantification of methane and non-methane hydrocarbons. We are interested in using our sensors for applications ranging from long-term ambient methane monitoring to leak-detection at potential sources (e.g., on a well pad). Hydrocarbon detection and monitoring present a unique challenge because typically many different hydrocarbons may originate from a single source and the types as well as relative proportions of these different hydrocarbons varies from source to source. For example, two different oil and gas basins may have very different make-ups in terms of the relative proportions of methane, propane, ethane, etc… in the natural gas. For this reason we calibrate specifically for the environment in which we plan to sample and we are exploring different types of analysis and the use of sensor arrays to better isolate particular hydrocarbons, such as methane, or improve our quantification of groupings, such as total non-methane hydrocarbons.