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GE Measurement and Control has launched the Aurora Trace moisture analyser, which uses high-definition laser absorption spectroscopy (HDLAS) to measure moisture levels in natural gas.

Aurora Trace is designed to deliver the critical trace moisture measurement required for natural gas liquefaction processes. The device can also be used for a wide range of applications across the petrochemical industry where water detection is important.

The high-definition technique scans a laser diode across a narrow frequency band. Water, even in minute amounts, causes a loss of laser light at specific light frequencies. The loss of laser energy is directly related to the concentration of water.

Aurora Trace incorporates two fundamental features designed to increase sensitivity and resolution: the first is a multi-pass optical cell to bounce the laser beam back and forth between two specially curved mirrors; and the second is the application of vacuum in the measurement cell, which decreases the interactions between the water and carrier gas molecules.

Key benefits

  • Aurora Trace’s precision measurement capabilities provide readings in real time with up to 30 times more resolution than existing laser absorption analysers. 
  • The analyser’s fast response quickly alerts and documents when moisture concentrations exceed acceptable levels; once process upsets are corrected, the fast response ensures that the process gas meets required specifications and contractual requirements.
  • According to Ken Soleyn, product manager of measurement and control for GE Oil and Gas, the laser moisture analyser dramatically increases sensitivity to water molecules within the gas, thereby overcoming the limitations of conventional moisture analysers.
  • By applying a vacuum to the measurement cell, interactions between the water and carrier gas molecules decrease, thus enhancing resolution and improving precision, reducing interference and maintaining trace moisture measurement precision.
  • Aurora Trace is certified for use in hazardous environments and is able to operate without maintenance for more than five years; it does not require field calibration or zero gas base-lining.

GE Measurement & Control

GE Measurement & Control is a leading innovator in advanced, sensor-based measurement, non-destructive testing, inspection and condition monitoring and flow and process control solutions.

GE Measurement & Control is a leading innovator in advanced, sensor-based measurement, non-destructive testing, inspection and condition monitoring and flow and process control solutions. Providing healthcare for our customers’ most critical assets, we deliver accuracy, productivity and safety to a wide range of industries, including oil and gas, power generation, aerospace, metals and transportation. Headquartered in the Greater Boston area in the US, GE Measurement & Control has facilities around the world and is part of GE Oil & Gas.

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