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For which of the following the non-dispersive infra-red (NDIR) analyzer is used to measure?(a) CO2(b) CO(c) HC(d) NOxThis question was posed to me during a job interview.My question is from Measurements and Testing in division Automotive Electronics, Engine Performance Parameter & Testing of Automobile Engines of Automobile Engineering

Answer»

Right OPTION is (b) CO

To EXPLAIN I would SAY: Non-dispersive infra-red (NDIR) analyzer is used to measure CO. The method of detection is based on the principle of selective absorption of the infrared energy of particular wavelength unique to a CERTAIN gas which will be absorbed by that gas.



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