| 摘要 |
Described is a sensor (1) operating according to the light absorption principle, for detecting CO2. The sensor (1) comprises a housing (2) having therein a measuring chamber (3). On both sides of the measuring chamber (3) are arranged a source (20) and a detector (30) for measuring light (23). The source (20) is a bulk piece of dysprosium-doped lanthanum sulfide glass, which receives pump light (12) generated by an LED (10). The LED (10) can be fed by means of a solar cell (40). The detector (30) generates an electric signal which is representative of the amount of measuring light received (23), which amount is indicative of the amount of CO2 in the measuring chamber (3). The sensor (1) according to the present invention is very simple, compact, inexpensive and energy-saving.
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