GAS MEASURING SYSTEM Russian patent published in 2020 - IPC G01N21/31 

FIELD: measuring equipment.

SUBSTANCE: invention relates to systems and methods of detecting and measuring gases in a sample, and more specifically to systems of absorption spectroscopy and methods for quantitative determination of rare substances (for example, hydrogen sulphide) in a sample of gas, for example in a sample of natural gas. Disclosed spectroscopic system for measuring trace level and/or ultrasonic level of content of hydrogen sulphide in a sample of natural gas comprises: laser for generation of output beam in aggregate from one or more discrete or continuous wavelength ranges at scanning frequency from approximately 0.1 Hz to approximately 1000 Hz in specified set of one or more discrete or continuous wavelength ranges; transmitting optics for directing and/or forming an output beam from the laser to the natural gas sample; an optical detector for receiving light from a natural gas sample and generating a detector signal corresponding to the received light; and a computing device processor and a storage device (non-current computer-readable medium), storing instructions which, when executed by a processor, cause the processor to calculate a trace and/or ultrasound level of hydrogen sulphide content in the natural gas sample based on the signal, corresponding to received light. Set of one or more discrete or continuous wavelength ranges has one or both ranges (i) and (ii) of the following: (i) a first range with width of at least 0.05 cm^-1, comprising at least one wave number value in range of 5066 cm^-1 to 5076 cm^-1; and (ii) a second range with width of at least 0.05 cm^-1, comprising at least one wave number value in range of 5086 cm^-1 to 5097 cm^-1.

EFFECT: technical result is improved method and system for monitoring hydrogen sulphide in natural gas.

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