Natural gas is a valuable resource and is transmitted and distributed through over 2,000,000 miles of pipelines in the United States alone. Gas pipelines are subject to damage and corrosion, resulting in gas leaks that are extremely difficult to detect. Methane, the primary component of natural gas, is inherently colorless, odorless and diffuses rapidly into the air once it escapes the pipeline. Conventional techniques to detect methane leaks are limited and inefficient because they require point samplings of methane concentrations. Many sensors must be installed and maintained and even then these sensors must be in close proximity with the leak to provide useful information. Our product, GasTutamenTM, offers a new innovative approach to detecting gas leaks using near-infrared (NIR) spectroscopy. Using this process, GasTutamenTM is capable of detecting gas leaks from far away and provides a far more cost effective solution by requiring fewer sensor nodes.
Gas Leak Detection - A Challenging Problem
There are two major techniques used for gas pipeline leak detection: (1) active detection, which requires illuminating the scene with a radiation source such as a laser which is absorbed by the gas plume, and (2) passive detection which relies on radiative transfer resulted from the temperature difference that usually exists between the background and the methane (CH4) plume. Active detection removes the constraint of thermal difference, but requires a laser and a scattering surface behind the gas for echo signals. While passive methods allow a long range of detection with a relatively simple thermal imaging device, these methods rely upon a thermal flux between the gas plume and the ground surface below it.
Remote Gas Leak Detection Using Sunlight
Since the existing active detection system is too
expensive and passive detection system is less reliable, Migma has
developed a system which utilizes sunlight during daytime to detect the
methane, within 840 - 940 nm wavelength range. Being able to detect
methane within this range is significant, which makes it possible to
dramatically reduce the system cost associated with an expensive NIR
spectrometer, an expensive laser device, and complex and costly system
This gas leak detection product utilizes Migma
Systems patented technology to reliably
measure spectral absorbance during different time of a day under various
weather conditions. This is achieved by applying a pattern matching
technique using a set of normalized light intensity profiles estimated
from the vacuum scanning. A low-pass filter, specifically designed for
spectra data processing, can effectively remove the spectral measurement
Need more information?
Product brochure can be downloaded here.
Our paper presented at ISA 2006 can be downloaded here.
Our paper presented at SPIE 2006 can be downloaded here.
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For more information, please contact us:
Migma Systems, Inc.
Attn: Sales Department
1600 Providence Highway
Walpole, MA 02081