QLM is a UK-based photonics technology company with headquarters in Cardiff and operations in Bristol and San Francisco, formed in 2017 with support from Bristol University’s Quantum Technology Enterprise Centre. QLM developed a new type of gas imaging camera – based on quantum technology developed at the University of Bristol – that combines lidar and gas absorption spectroscopy with single-photon detection. This novel imaging technology can detect, visualize, localize and accurately quantify emission rates of greenhouse gases (GHGs). The solution has demonstrated industry-leading quantification performance and enables customers in GHG-intensive industries to identify and prioritize the most consequential emitters for remediation in the most cost-effective manner. QLM’s lidar technology is inherently scalable to low cost at high volume, enabling wide deployment.