FIELD: heat-power engineering; thermal power stations and boiler plants working on gaseous and liquid fuel. SUBSTANCE: device is provided with the following units arranged in series in optical axis: projection unit, flame radiation spectral components separation unit, photodetector unit, converter unit and unit for communication with computer. Flame radiation spectral components separation unit is made in form of disperse element and telescopic system with spectral filter and multi-channel deflecting element located in series in optical axis in focal plane of first objective of telescopic system; spectral filter has M slots. Multi-channel deflecting element consists respectively of M sections. Photodetector unit has linear multi-element photodetector; string of photosensitive elements is located in focal plane of second objective of telescopic system in parallel with row of slots of spectral filter. EFFECT: enhanced efficiency. 2 cl, 5 dwg
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