This dataset contains information on pneumatic controllers encountered on the oil and gas production sites surveyed as part of the study. The dataset includes the type and use of the controllers along with optical gas imaging observation results on observed emissions from the controllers and high volume sampler emission assessments of a subset of controllers measured. This dataset is associated with the following publication: Stovern, M., J. Murray, C. Schwartz, C. Beeler, and E. Thoma. Understanding Oil and Gas Pneumatic Controllers in the Denver-Julesburg Basin using Optical Gas Imaging. JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION. Air & Waste Management Association, Pittsburgh, PA, USA, 468-480, (2020).