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and industrial facilities
Siemens FDBZ492-HR (S54319-B23-A1) Duct Housing - 2 Wire with Relay for Addressable Systems
it delivers accurate and reliable sensing using a pulsed LED light source and a silicon photodiode receiver—ideal for modern fire safety systems
the module maintains circuit integrity even in the event of a single open condition
System Sensor 5621 Heat Detector HTRI-M (500-034000) and industrial facilitiesSystem Sensor 5621 is a 135F fixed temperature, rate of rise, dual circuit, mechanical heat detector
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