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...e no function. From more than a couple feet away, it just looks like an inactive LED bulb, so it’s nice and stealthy. It has a 90 si...

... that senses , typically as an indicator of fire. Commercial security devices issue a signal to a fire alarm control panel as part of a fire a...

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... semiconductor gas sensitive material with low conductivity in clean air. When the detected gas exists in the ambient air, the conductivity of the ...

... base and various independent photoelectric fire detection alarms. The alarm information that the sensor can send includes fire, fault,...

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... , which is one of the alarm series products. The alarm adopts optical inductive device and excellent production technolo...

....The is designed to give early warning of developing fires by giving off the alarm sounds from its built-in alarm horn. It can provi...

... to give an early warning of an ongoing fire by sounding a siren through a built-in siren. It can provide valuable escape time for people before th...

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...a couple of infrared diodes. The principle of detecting is granule in the can reflect infrared light. Infrared diodes are placed in the speci...