| 摘要 |
A bulk stream detector for a conduit (4, 5) feeding granular, hygroscopic material to be filled into spacer frames (3) for insulating glass from a storage container to a filling head (1) comprises a punctiform light source (8, 9) connected to the conduit (4, 5), this light source emitting a light beam (11) traversing the conduit. A sensor (10) responding to the light (11) emitted by the light source (8, 9) is arranged in opposition to the light source (8, 9). The sensor (10), under the effect of the light impinging thereon from the light source (8, 9), transmits a signal to a control unit (12, 13) which latter, in turn, transmits a signal if, during a preselected period of time after the last signal transmitted by the sensor (10), no signal has been received from the sensor (10).
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