2.2 Principles / Modes of Operation
– Gas levels are determined by measuring the absorption of infrared radiation, transmitted through the flue gas, in a wave band sensitive to absorption by the measurement gas. The EnergyTech 401 has two detectors; one measuring the radiation directly to provide a live output, sensitive to the measurement gas, while a second detector measuring the radiation after passing through a gas cell filled with pure reference gas (CO), to provide a reference measurement, completely unaffected by the measurement gas.

Energy Tech_401_manual

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