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sensor smart city pressure monitoring gas pressure monitoring industrial pressure sensor pressure alarm device IoT pressure monitor EN54 smoke heat detector fire safety smoke detection fire alarm fire protection smoke alarm fire detector fire sensor photoelectric detector EN54 certified CE approved fire safety equipment addressable detector conventional detector wireless smoke alarm battery smoke detector hardwired detector OEM smoke detector wholesale fire alarm fire detection system smart fire alarm IoT fire safety commercial fire protection industrial smoke detector shower pull cord alarm smart home hub gas alarm for elderly elderly fall detection assisted living facility supplier smart home for seniors elderly assistive devices UL listed smoke alarm B2B elderly monitoring aging population safety interconnected smoke alarm aging in place supplier senior-friendly home automation aging in place technology geriatric care technology senior safety OEM dementia safety device home safety 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