| 摘要 |
In order to render the IR motion detector advantageously independent of the installation site and its type of installation, it is provided according to the invention to accommodate the radiation detector (3), which is situated at the focal point of a semi-cylindrical or hemispherical Fresnel lens arrangement (4), and the electronic circuit arrangement, included on a printed circuit board (2), in a spherical plastic housing (1) which can be aligned with the monitoring area in question while being mounted in the manner of a ball joint inside the respective flush-mounted, surface-mounted or recessed cover (8). <IMAGE>
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