Leak detection and repair (LDAR) refers to the process of locating and repairing fugitive leaks. It encompasses several techniques and equipment types. One common approach is the use of _infrared cameras_, which make methane leaks visible. LDAR can be applied across the supply chain — to upstream activities (including well development, gathering, processing) and/or downstream activities (such as transmission or distribution lines). Gas detection requires sensing and imaging in the infrared, where sensors are traditionally **expensive or unavailable**. Recent progress in the space features developments towards _extending the wavelength coverage of detectors into the infrared / leveraging quantum physics to illuminate in the infrared but image in the visible_ (Refer to [QUANTIC](https://www.quantic.ac.uk/)) > Quantum Information Science powered detectors can extend our accessibility & sensitivity to non-visible wavelengths of infrared and ultraviolet. These innovations could be used to create and augment tools used to measure green house gas emissions. > Quantum Technologies could help us build cameras that see at the correct wavelength at low cost. This would allow us to detect and image gases that are invisible to the naked eye as they interact with light. Refer to [GasSight](https://www.factbasedinsight.com/portfolio/gas-sight/) Real World Example: The SPLICE (Single Photon Lidar Imaging of Carbon Emissions) project by [QLM](https://qlmtec.com/). [UK Research and Innovation](https://medium.com/u/3c2166997ed7?source=post_page-----ad20cc0ff129--------------------------------) & [NPL](https://www.npl.co.uk/news/quantum-enabled-camera-to-cut-methane-leaks) uses their [Tunable Diode Lidar (TDLidar) gas sensors](https://qlmtec.com/wp-content/uploads/dae-uploads/QLM-Single-Photon-Lidar-Gas-Imagers-for-Practical-and-Widespread-Continuous-Methane-Monitoring.pdf). This is highly valuable as it offers Long-range, sensitive, speedy and precise mapping of gas leak locations & flow rates.