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How long do hardwire smoke detectors last? 

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The sensors are best for combination with other techniques, such as smoke detectors.
It is shown that such a smoke detector is able to operate reliably under low concentration of smoke and high relative humidity conditions.
This is critical in scenarios where traditional smoke detectors cannot be installed.
Efforts to increase protection with smoke alarms should be augmented with programs to insure adequate and timely testing and maintenance of existing smoke alarms.
The results of these experiments show that the smoke detectors, especially the ionization detector, are sensitive to cooking fumes and nuisance alarms are easy to happen.
This paper demonstrates the usability of gas sensor technologies for fire detection to enhance the performance of conventional smoke detectors.
However, the learning of smoke representation in the detectors will be restricted by the appearance gap between real and synthetic smoke samples, which will cause a significant performance drop.
Alarm algorithms utilizing ionization detector smoke measurements proved to be more effective than measurements from photoelectric detectors.
The work presented in this paper shows that a system of gas sensors, etc., is capable of detecting fires faster than a system of two ordinary smoke detectors, without an increased rate of unwanted alarms.

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