Sherlock VOC is a fugitive gas imaging and quantification camera that can be used for LDAR as an alternate to Method 21 soon to be mandated by law. The Sherlock VOC enables the user to see an invisible gas leak and determine the mass of its emission over time (that is, it quantifies the amount of the leak). Sherlock VOC can log data, and video records the leaking gas and components that need repair under the LDAR program LDAR. Moreover, the video clips of leaks can be stored for verification and auditing purposes.