The Model 200EU is a new model of analyzer based on the Model 200E Chemiluminescent Analyzer for measurement of NO/NO2/NOx. The Model 200EU offers ranges of 0-5 ppb to 0-2000 ppb, with a lower detectable limit of 50 ppt (parts per trillion). This sensitivity is coupled with improved noise and drift specifications for the most demanding ultra-low level measurements. The time-proven, dependable design of the Model 200E has been combined with an enhanced performance pump and a special low-noise photomultiplier/power supply combination for greatly improved noise performance. The overall effect of these enhancements is a greatly improved signal-to-noise ratio allowing much more sensitive measurements and minimizing interferences. Like all TAPI "E" Series, the Model 200EU includes built-in data acquisition capability (iDAS) using the analyzer's own internal memory. This allows the logging of multiple parameters including averaged or instantaneous concentration values, calibration data, and operating parameters such as pressure and flow rates. Stored data is easily retrieved through one of two independent RS-232 ports or from the front panel, allowing the operator to perform predictive diagnostics by tracking parameter trends. The Model 200EU may also be used with an external NOy converter for measuring reactive oxides of nitrogen.
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