Using Chemiluminescence, the 42C series is capable of measuring oxides of nitrogen from sub parts per billion (ppb) to 5,000 parts per million (ppm). Extended troubleshooting diagnostics provide instantaneous indication of instrument operating status. Reliable. Industry standard. U.S. EPA Designated Method RFNA-1289-074
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Product Detail
For High Sensitivity Air Monitoring
The Model 42C Trace Level represents the state-of-the-art subambient chemiluminescence measurement. Due to a combination of hardware design, plumbing arrangement, and software development, the Model 42C Trace Level can achieve detection limits of 50 ppt or better without sacrificing fast response, ease-of-operation, or cost effectiveness.
The Model 42C Trace Level utilizes a single reaction chamber and photomultipier tube which are time-multiplexed for NO, NOX, and zero measurement. The difference between the three measurements allows the generation of three continuous signals of NO, NO2, and NOX. Since the Model 42C Trace Level measures zero continuously, there is virtually no zero drift.
In the NOy configuration, the Model 42C Trace Level is modified to allow more accurate monitoring of total reactive oxides of nitrogen, for example nitric acid (HNO3) and peroxyacetyl nitrate (PAN). A molybdenum converter is used upstream of its normal location in order to minimize any NOy loses.
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