Remote sensing methane leaks using laser detection
The system, referred to as a laser pointer, measures the spectral absorption of methane as the laser beam passes through the air around the suspected leak. Different gases absorb light at different frequencies so each has a characteristic absorption signature. The project team's system can be aimed at the area to be tested for leaks from a distance of up to 30 metres. The field tests found that it could detect concentrations of methane from a few tens to at least 1000 parts per million by mass (ppmm). With a time resolution of 100 milliseconds (ms), the laser pointer speeds up gas leak detection. Both the speed of leak detection and the range reduce risks, potentially contributing to saving lives. A range of prototypes has been produced by Siemens and by Glasgow University. The low-weight, low power consumption and compact instruments are ready for commercial exploitation in a significant sized European market for such equipment.
