Product/Service

The model 400 CLD analyzer utilizes the principle of chemiluminescence for analyzing the NO or NOx concentration within a gaseous sample. In the NO mode, the method is based upon the chemiluminescent reaction between ozone and nitric oxide (NO) yielding nitrogen dioxide (NO₂) and oxygen. Approximately 10% of the NO₂ produced from this reaction is in an electronically excited state. The transition from this state to a normal state produces light which has an intensity proportional to the mass flow rate of NO₂ into the reaction chamber. The light is measured by means of a photodiode tube and associated amplification electronics. In the NOx mode, NO plus NO₂ is determined as above, however, the sample is first routed through the internal NO₂ to NO converter which converts the NO₂ in the sample to NO. The resultant reaction is then directly proportional to the total concentration of NOx.

The analyzer is designed to continuously measure the total concentration of oxides of nitrogen within a gaseous sample. The gaseous sample can be ambient air, exhaust gases from an internal combustion engine, or exhaust gases from a combustion process. A dry measurement method may be desirable for the direct calculation of mass emissions by adding the optional sample chiller. It is also designed to meet the specific requirements of the U.S. EPA Federal Register, Title 40. Applications include stack gases (CEM), scrubber efficiency, process chemical gas analysis, personnel safety, and power plant stack de-nitrification. Features include:

•Sensitivity to 3 ppm NO/NOx
•Automatic high voltage shut-down with loss of ozone air
•Complete digital presentation including sample and air pressure (no gauges)
•Five ranges
•Remote operation capability
•Dry measurement (optional)

, 1238 West Grove Avenue, Orange, CA 92865-4134. Tel: 714-974-5560; Fax: 714-921-2531.

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