| 摘要 |
A battery powered products of combustion detector and warning device, which is interconnectable in a detecting system with other similar devices, is characterized by means for providing separate, distinct and sensibly perceptible signals representative of (a) a standby or quiescent condition of the device, (b) the energy level of the battery decreasing to at least a predetermined level, (c) the sensitivity of the device to the phenomena decreasing to at least a selected level, (d) detection by the device of the occurrence of the phenomena, or (e) detection of the phenomena by another warning device interconnected therewith. In consequence, a user of the warning device is readily and continuously apprised of the operating condition and state of the device. |
