Innovations in Communications™ Since 1955

155 Adams Avenue, Hauppauge, New York, 11788-3699 USA
Phone: 800-231-1414 or 631-231-1414 Fax: 631-231-1498 E-Mail:

Conventional Fire Alarms
Smoke Detectors
 Edwards is a registered trademark of UTC Fire & Security

The Edwards photoelectric smoke detector is an interchangeable head and base detector with a light-scattering optical sensor. A pulsed infrared LED light source and a high-speed photodiodesensing element are housed in an omni-directional sensing chamber protected by an insect screen. The chamber is not affected by ambient light. The detector features a field-replaceable optical chamber to simplify cleaning.

The 721UT photoelectric detector includes integral fixed temperature heat detectors. Edwards 700 Series smoke detectors are suitable for use in commercial and industrial environments. If the detector drifts out of its UL Listed sensitivity range or fails internal diagnostics, the alarm LED flashes once a second to indicate trouble. This meets NFPA 72 field sensitivity testing requirements without the need for external meters. Applying a magnet near the detector’s integral reed switch activates a self-diagnostic routine that provides visual indication of sensitivity level, or if service is required. Built-in drift compensation allows the detector to automatically adjust its sensitivity over time as it becomes dirty.

Self-diagnostic capability continually monitors operation
 Built-in drift compensation
 Field-replaceable optical chamber
Low-profile design blends into the ceiling
 Advanced nuisance alarm immunity
 Meets NFPA 72 field sensitivity testing without the need for external meters
 Extensive two-wire compatibility listings
 White head and base
 Operating temperature range: 32°F to 120°F (0°C to 49°C)
Click for Spec Sheet
711U EDWARDS Two-wire Self-Diagnostic Smoke Detector
721UT EDWARDS Two-wire Self-Diagnostic Smoke Detector with Heat
701U EDWARDS Two-wire Self-Diagnostic Smoke Detector Bases, 3 Terminals
702U EDWARDS Two-wire Self-Diagnostic Smoke Detector Bases, 6 Terminals
211-10PKG EDWARDS Replacement optical Chambers
| Brochure | Doc | Spec Sheet | User Guide | Manual | Wiring |
This page was last updated November 10, 2014

 Phone: 800-231-1414 or 631-231-1414   Fax: 631-231-1498 E-Mail:

©2001-2012 Lee Dan Communications, Inc., All rights reserved. Best Viewed in Internet Explorer 8