Security Systems and Surveillance

The ESL 500 Series including the 521B and 521BXT self-diagnostic, two- wire photoelectric smoke detectors are the industry's first conventional direct-wire smoke detectors with analog features such as drift compensation, multi-criteria detection and remote maintenance/trouble reporting (CleanMe). The 500 Series continually monitor their own sensitivity and operational status, and provide a visual indication if they drift out of the sensitivity range or fail internal diagnostics. The 521 Series also can send a signal (CleanMe) to any compatible control panel, allowing the dealer/installer to schedule a service call and avoid a false alarm. UL, ULC CSFM Features: · CleanMe - remote maintenance reporting reduces false alarms (2-wire detectors only) · Smart dual fixed/rate of rise heats work with photo chamber to catch fires faster (521BXT) · Built-in drift compensation reduces false alarms · Field replaceable optical chamber makes servicing a snap · Small, low profile design blends in with any env

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