| 摘要 |
<p>The present invention relates to a method and to an arrangement for optically indicating that the gas pressure of a gas reservoir connected to a consumer has reached a predetermined value. This value is indicated by an acoustic signal within a predetermined frequency range and at a given lowest sound level. The method is characterized by listening for sound within the predetermined frequency range and above the lowest sound level with the aid of an active listening device, and activating a light source in response to the sound heard by this device. The arrangement for optically indicating that the gas pressure of a gas reservoir connected to a consumer has reached a predetermined value includes the gas reservoir, a gas delivery line which connects the gas reservoir with the consumer, and means for delivering an acoustic signal within a predetermined frequency range and at a sound level which exceeds a predetermined lowest value, and a sound detecting unit which actively listens for sound within the predetermined frequency range and at the sound level exceeding the lowest value, and a light source which is connected to the sound detecting unit.</p> |
