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The unit uses a split spectrum sensor, a special type of photoelectric sensor, which is designed to detect both smoky and flaming fires.

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Swing gates are more aesthetically pleasing but you must take into account the opening radius depending on the length of the gate. Sliding gates will eliminate this issue as they retract rather than swing out. You will also need to consider how much power is required to open and close your driveway gate. The amount of power is dependent on the size of your gate, how it opens and how many times it will need to be opened each day. Finally, how will your gate be accessed, and by how many users?Electric gates are operated by a controller which sends a signal to the opening mechanism. There are several options for your controller: Wireless Wired keypads Keypads with intercoms Key card operated controllers Controllers operated by remotes or telephones Each of these features will affect the price and your final decision should be based on your budget and personal preference.

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Amazon is selling as much facial recognition software as it can to law enforcement agencies despite recent controversies and now it's hoping its home products will attract more subsidized deployments.

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