FIELD: emission spectral analysis of different materials. SUBSTANCE: device has series connected a linear displacement sensor, pulse shaper, counter and unit for computing a wave length an output of which is connected to third input of memory unit for storing sample spectrum and to input of control unit the fourth output of which is connected to second input of the counter the first input of which is connected to the second input of an analogue-to-digital converter. EFFECT: enhanced accuracy. 2 cl, 2 dwg
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