FIELD: measurement equipment.
SUBSTANCE: invention refers to analytical instrument engineering. Spectrometre contains casing with entrance gate inside of which optical system is installed at output of which multi-element photodetector is installed connected to electronic unit of control and processing of output signals. Casing is designed leakproof and multi-element photodetector installed in it is designed without casing, at that spectrometre casing is vacuum-treated and/or filled with inert gas.
EFFECT: lowering of detection level due to reduction of background radiation.
6 cl, 2 dwg, 3 ex
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