449C - ESL Smoke Detector Review
The 449C Series self-diagnostic, Four-wire smoke detectors continually monitor their own sensitivity and operational status and provide a visual trouble indication if they drift out of sensitivity range or fail internal diagnostics. They meet NFPA 72 field sensitivity testing requirements without the need for external meters. Features: Intelligent, self-diagnostic * Field-replaceable optical chamber * Low-profile design * Plug-in terminal block * Advanced false alarm immunity * 12VDC and 24VDC operation. Read more...
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