521BXT ESL Photoelectric 2-Wire Smoke Detector w/ Heat Detector

The ESL 500 Series self-diagnostic, two- and four-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

1 Photoelectric 2-Wire Smoke Sensor

6-12 VDC.
Self-diagnostic; low-profile design; field replaceable optical chamber.
Built-in drift compensation.
UL listed.

Special Notes
Compatible with most hardwire systems.
CleanMe function may not be compatible with all systems.