NON-DISPERSION TYPE INFRARED GAS ANALYZER

摘要

PURPOSE:To make possible the measuring of a high-density gas component in a small curve of output characteristics with a single sample cell long enough to obtain the quantity of a signal allowing stable measurement for a low density gas component in a multi-component infrared gas analyzer which analyzes the low density gas component and the high density gas component simultaneously. CONSTITUTION:An infrared-ray source section 2 which has a gas 10 to be measured of a component with a high density rang as measuring area sealed in at a specified partial pressure is arranged with an infrared transmission window 9 on the incoming side of a measuring cell 1 and a detection block 5 which has a detection unit 7 made up of an infrared sensor 7A and an optical band pass filter 7B in a pair assembled into a sensor mounting block 6, on the outgoing side. A transmission wavelength band of the optical band pass filter provided on the detection unit 7 of the gas to be measured with the high density range as measuring area is so set to cover almost the whole of one absorption band of the gas 10 to be measured.