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  GE Security GEC-721U G/E 2 Wire Fast Response Photoelectric Smoke Detector with Remote Alarm Trouble LED 12/24VDC S10A Compatible

GE Security GEC-721U G/E 2 Wire Fast Response Photoelectric Smoke Detector with Remote Alarm Trouble LED 12/24VDC S10A Compatible


Our Price : $43.43

Product Code: GEC-721U


The 721U photoelectric smoke detector is a side mounted, light-scattering optical sensor that provides outstanding stability and excellent response to a wide range of fires. A pulsed infrared LED light source and a high-speed photodiode sensing element are housed in an omnidirectional sensing chamber which is protected by an insect screen. The chamber is not affected by ambient light. For easy cleaning, the chamber unsnaps and is field-replaceable. As soon as the heat sensor detects a rapid rise in temperature, the sensitivity of the photoelectric sensor increases. 721U smoke detector is the industry's first conventional self-diagnostic detectors specifically designed for the demands of 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. And, as they get dirty, the 721U detector automatically adjust the alarm threshold through built-in drift compensation.


Model: 721U
Alarm Current Consumption[Maximum]: 60.0 mA
Color: White
Detector Head Depth[Nominal]: 1.75 in
Detector Head Diameter[Nominal]: 4.0 in
Drift Compensation Adjustment: 1 %/ft
Field Wiring Size[Minimum]: 12.0 AWG
Field Wiring Size[Maximum]: 24.0 AWG
Height[Nominal]: 1.98 in
Maximum Ripple[Maximum]: 10.0 %
Packaging Basis[Nominal]: 10.0 per carton
Regulatory Approval: UL 268
Relay @ Contact Rating: 1.0 A @ 120.0 V
Remote LED Output Current[Minimum]: 5.0 mA
Remote LED Output Current[Maximum]: 8.5 mA
Reset Time[Maximum]: 1.0 s
RFI Immunity @ ..: 20.0 V/m @ 1000.0 MHz
Sensitivity - Photoelectric[Minimum]: 1.85 %
Sensitivity - Photoelectric[Maximum]: 3.2 %
Sensitivity - Photoelectric[Nominal]: 2.85 %
Standby Current Consumption[Nominal]: 70.0 ľA
  • Intelligent, self-diagnostic
  • Built-in drift compensation
  • Photoelectric model has a fieldreplaceable optical chamber
  • Low-profile design
  • Advanced false alarm immunity
  • Interchangeable head and base design
  • Widest two-wire compatibility listings

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