700 Series conventional photoelectric smoke detectors are interchangeable head and base detectors with a light-scattering optical
sensors that provide 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 protected by an insect screen. For easy cleaning, the detector
features a field-replaceable optical chamber.
Model 721UT photoelectric detectors include integral fixed
temperature and rate-of-rise heat detectors. The 721UT provides
remote alarm and trouble LED driver outputs. Also available is
the 713-5U electronic heat detector head for areas too dusty for
700 Series smoke detectors were 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 a trouble condition.
This meets NFPA 72 field sensitivity testing requirements without
the need for external meters.
Additional diagnostic information is activated by applying a magnet
near the detector’s integral reed switch. This initiates a self-diag
routine and provides visual indication of sensitivity level, or if service
is required. The magnet test causes the LED to blink. The number of
blink counts corresponds to a smoke detector sensitivity range.
And, if they become dirty over time, the 700 Series detectors
automatically adjust the alarm threshold through built-in drift compensation. If the detector ever does need to be cleaned, the patented field replaceable optical chamber makes cleaning a snap.
•Self-diagnostic capabililty continually monitors operation
•Meets NFPA 72 sensitivity test requirements
•Head and terminal base design (base sold separately)
•Automatic drift compensation
•Field-replaceable optical chamber
•Low-profile design blends into the ceiling
•Advanced alarm verification nuisance alarm immunity
•Continuity switch in base to ease installation
•Extensive two-wire compatibility listing