Unlike extractive systems, Procal’s patented, sintered metal technology removes the need for filtering and allows the analysis of an unmodified and truly representative gas sample and up to six concentrations can be monitored simultaneously. Mid IR pulses, at two specific wavelengths for each monitored gas, are transmitted through the cell, the ‘reference’ pulse passing through unaffected, while the ‘measure’ pulse is partially absorbed, thus giving a reading of the gas concentration. The Procal 2000 uses the reflective beam principle to measure process gas directly, as it enters the sample cell. The technology is there to provide instant, accurate CO2 measurement.” These systems are accurate to a few parts per million with gas species-specific ranges from 100 to more than 1000 ppm, depending on what requires measuring.

“In contrast to extractive sampling, where an exhaust gas sample needs to be physically extracted from the system and then analysed, ‘in-situ’ emissions monitoring provides a continuous, real time measurement of the content of exhaust gases. “Russia’s delegation raised questions regarding the technology, asking for the deadline to be postponed to 2021.”Īccording to Dye, at the specialist infra-red (IR) and ultra-violet photometric gas detection company Procal – part of Parker Kittiwake – they feel the most effective method for measuring emissions lies in in-situ monitoring, inside the exhaust, using a CEM system.

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