Who can tell me what this is? It belongs to the hotel room, and there is a small red light on it, which will flash.

The smoke detector can detect a large amount of smoke produced in a fire and send out an alarm signal in time. The detector is controlled by a single chip microcomputer, which can intelligently judge the smoke generated during the fire and give an alarm. The alarm adopts photoelectric smoke detector, which has excellent production technology, stable operation, beautiful appearance, simple installation and no need of debugging. Can be widely used in hotels, shops, Internet cafes, dance halls, cafes, leisure halls, residential and other places of fire safety monitoring. The alarm has a built-in buzzer, which will make a strong sound after the alarm. The alarm is powered by 9V laminated battery, which consumes little power and can be used continuously for more than one year.

Classification of smoke detectors:

1. coded smoke sensor (intelligent smoke sensor), which needs to be used by a dedicated host, connected by two buses and powered by DC24V; After the alarm, the signal is output to the host computer, and there is no light at the scene. Mainly used in fire protection systems, such as hotels, KTV, factories, communities and other large places, to play an overall preventive role.

Second, switch the smoke sensor (relay smoke sensor). This kind of smoke sensor also needs to be used by the related host computer, but it can mainly provide 9V-28V DC voltage, so the smoke sensor can work normally and output the switching signal to the host computer after on-site acousto-optic alarm. It is mainly used for environmental monitoring of telecommunication base stations and computer rooms, smart homes and building intercom. , mainly used for the prevention and coordinated monitoring of individual equipment and sites.

Three, multi-line smoke sense (traditional smoke sense), can be used in conjunction with any multi-line host, after the alarm, through the pull-down voltage to the host alarm signal, the scene was silent. Domestic fire protection only recognizes bus fire protection system, so multi-line system is mainly used for export, which is suitable for small places like villas.

Wireless smoke sensor is an upgraded version of independent smoke sensor, which has one more function of transmitting wireless signals than independent smoke sensor. Generally, it is also powered by 9V battery, and the wireless frequency is generally 3 15M (domestic mainstream, mainly 433M abroad, depending on the host), which is used to support the wireless host. Due to the influence of distance and other factors, the use of wireless signals is quite limited.