DEVICE FOR UV-SPECTROMETRIC ANALYSIS OF GASEOUS COMPOUNDS

摘要

The invention concerns a device (20) for UV-spectrometric analysis of gaseous compounds, comprising: a measurement channel (5) to accommodate a flow of sample gas, a window (16) transparent for ultraviolet radiation arranged at a first end (5a) of the measurement channel (5), a radiation source (11) generating ultraviolet radiation arranged to emit radiation through the window (16) into the measurement channel (5), and a spectrograph (3) for measuring ultraviolet radiation at a second, opposite, end (5b) of the measurement channel (5). The invention is characterized in that the first end (5a) of the measurement channel (5) is open towards the window (16) and in that a channel (6, 18) for guiding a protection gas is arranged in connection to the window (16) such that protection gas fed through the protection gas channel (6, 18) is allowed to flow over and cover the side of the window (16) facing the measurement channel (5) and to flow further into the measurement channel (5).