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The ESL 449/448
Series self-diagnostic, four-wire smoke
detectorscontinually monitor their own
sensitivity and operational status, andprovide a
visual trouble indication if they drift out of
sensitivity rangeor fail internal diagnostics.
This unique, patented technology meetsNFPA 72
field sensitivity testing requirements without
the need forexternal meters.Additional
diagnostic information is activated by applying
a magnetnear the detector's integral reed
switch. This initiates aself-diagnostic routine
and provides visual indication of
sensitivitylevel, or if service is required.This
series is easily cleaned by simply replacing
ESL's proprietaryfield-replaceable optical
chamber. All models are designed to reducefalse
alarms from dust, insects, RFI, and external
light.An integral combination rate-of-rise and
fixed 135°F (57°C), 50-footrated, heat sensor
is available with all "T" model detectors
(seeselection guide), allowing latching of the
alarm for either smoke orheat. The 449CSRH
includes an isolated alarm output for heat
andactivates an internal non-latching sounder
(local alarm) for smoke,making it ideal for
motel/hotel and dormitory rooms where
smokingpermitted. |
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Self-Diagnostic
Photoelectric Smoke
Detectors