H V A C
S y S t e m S
m o n i t o r i n g
400 Series™
High-Temperature
Duct Smoke Detector
Models Available
DH400ACDCIHTꢀ
ꢀ
4-wireꢀionizationꢀhigh-temperatureꢀductꢀꢀ
smokeꢀdetector
Product Overview
System Sensor DH400ACDCIHT is designed for interior
or exterior duct applications where extreme temperatures
can exceed standard detector capabilities. (For exterior
applications use DH400 OE-1 outdoor enclosure.) The
DH400ACDCIHT samples air currents passing through a
duct to provide dependable performance for management
of fans, blowers, and air conditioning systems. The twist-in,
twist-out 1451DHHT High-Temperature ionization detec-
tor head allows easy removal for quick cleaning, mainte-
nance, and replacement without removing the duct housing.
Temperature range 32° – 158°F (0° – 70°C)
Air velocity rating from 500 – 4,000 FPM
24 VAC/DC or 120/220 VAC operation
Agency Listings
DH400ACDCIHTꢀ
APA451ꢀ
RTS451KEYꢀ
RTS451ꢀ
RA400Zꢀ
PA400Wꢀ
ULꢀS911
ULꢀS4011
ULꢀS2522
ULꢀS2522
ULꢀS2522
ULꢀS3593
Easy and quick mounting to round or rectangular
ducts from 1′ – 12′ (0.3 – 3.7 meters) wide
3-year warranty
Accessories
System Sensor provides system flexibility with a variety of
As with our duct detectors, all duct detector accessories are
accessories, including two remote test stations, and several UL listed.
different means of visible and audible system annunciation.
ALARM
ALARM
F
ALARM
POWER
I
ON
RESET
TEST
R
E
RESET
APA451
Piezo
RTS451KEY
Remote Test
PA400W with
RTS451
Remote Test
Station
RA400Z
Remote
PS24LOW Add-on Strobe
Annunciator
Station with Key
Annunciator