Conventional slow emissions analyzers
The Chemi Luminescence Detection (CLD) measurement principle is the industry-standard method of measuring engine exhaust NO concentration. Conventional slow CLDs have response times of 1-2 seconds, and are typically used to measure "bag emissions" where the concentration changes very slowly.
A need for fast emissions analyzers
During the 1-2 seconds it takes a conventional CLD to respond, an engine will undergo many firing cycles. The conditions inside the combustion chamber can vary significantly between successive firing cycles- particularly when the engine conditions are changing rapidly such as during engine start or speed/load transients. The Cambustion CLD500 has a time response as low as 2ms T10-90%. This allows the CLD500 to distinguish between two adjacent firing cycles, and even offer information about the variation in NO concentration during a single exhaust stroke.
Benefits of fast emissions analyzers
Accurate measurement of exhaust emissions brings valuable insights into engine operation, and assists calibration engineers in reducing the engine out emissions. This can assist in emissions compliance while reducing after-treatment costs.
Optional Converter for NOx Measurement
The CLD500 can also measure NO2 through the use of optional NOx converters (based on the stainless steel method of NO2 to NO conversion). With these converters the CLD measures total NOx. (There is a cross-sensitivity to ammonia and other reductants in the sample). When fitted with the NOx convertors, a 10ms T10-90% response time is achieved.
The ability to record NO emissions data on such a fast time scale has opened up a range of study areas. (See Applications and Sample data.)
The brochure may be downloaded here.
Please contact Cambustion for more information and prices.