| 摘要 |
The invention relates to sensors for monitoring a medium comprising at least one electromagnetic radiation source and a detector of electromagnetic radiation, the medium being located in the ray path between the electromagnetic radiation source and the detector. The sensors are characterized by their ease of production. To that end, the electromagnetic radiation source and detector are disposed in at least one housing. Furthermore, the housing comprises two flat wall regions which are arranged at a mutual angle and are transparent to the electromagnetic radiation, such that these wall regions and the medium located thereat form a prism which refracts the electromagnetic radiation. In addition, the detector is at least a one-dimensional sensor comprising photo diodes for the refracted electromagnetic radiation, a spectrum which varies when the medium varies being detectable.
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