These instruments are designed to work in ambient air and to deliver accurate results at rapid response rates. If you require the fastest response rate possible (data rate up to 20 Hz), you will want to use our Fast Methane Analyzer. For applications requiring measurements of CH4 and CO2, both our Fast Greenhouse Gas Analyzer and our Methane/Carbon Dioxide Analyzer measure both gases simultaneously. In general, LGR Analyzers are not adversely affected by other atmospheric gases (no cross interferences) or changes in ambient atmospheric pressure (no pressure broadening effects). Due to our low-power requirements, LGR analyzers may be operated on DC battery power, with an appropriate voltage inverter, and still maintain their inherent accuracy.
The Fast Methane Analyzer is designed to suit many applications including eddy correlation flux measurements using established micrometeorological techniques, chamber flux measurements, and leak detection from natural gas pipelines.
As described in the Theory Section, the measurement strategy is based on high-resolution direct-absorption spectroscopy. As a result, the instrument is effectively self-calibrating. (Under extreme conditions—such as following shipment—you may wish to recalibrate the instrument. There is a Calibration mode available for this on each instrument.) Each LGR instrument includes an internal computer that can store data practically indefinitely on its internal hard drive (for applications requiring unattended operation), and send real-time data to a data logger through its analog and digital (RS232) outputs. In addition, an Ethernet connection allows remote access to data files stored on the instrument’s hard drive.
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