|
|
|
|
ALPIS™ is both a service and a system. One would not be possible without the other. After years of research and development, we have created an airborne gas detector that is rugged enough for the tough industrial environment, and yet sufficiently sensitive to detect even the smallest pipeline leaks. This unique system allows us to offer what we believe to be the best aerial leak detection service in the industry.
Principle of operation
Technically speaking, ALPIS™ is based on a mid-infrared Differential Absorption Lidar (DIAL) chemical sensor. The principle of DIAL relies on the selective absorption of laser light by different chemicals. The mid-infrared laser used in the ALPIS™ system is particularly well suited for detection of hydrocarbons such as methane, ethane, as well as volatilized liquid petroleum products.
In operation, the laser beam is transmitted down from the aircraft to illuminate the area on the ground above and around the buried pipe. The light reflected from the ground is collected by the sensor's receiver, and the amount of received energy is measured. If the laser beam passes through a gas plume emanating from a pipeline leak, the received energy will be diminished due to the absorption of laser light in the plume. This absorption signature is used to locate the leak and to assess its magnitude.
|
|
