The use of two technologies—microwave and PIR—and features like anti-masking, vandal-resistant housing, large
coverage patterns and three microcontroller-based sensitivity modes, make the powerful DT900 DUAL TEC sensors
ideal for the harshest commercial and industrial environments.
Microwave and passive infrared
(PIR) technologies, combined with
signal processing, provide excellent
detection while virtually eliminating
false alarms and costly service calls.
Sensor Sabotage Prevention
The DT900 Series uses Active
Infrared for anti-masking to detect
attempts to mask the sensor. The
patented look-down lens catches
saboteurs who try to disable the
unit from below, while three different
tamper switches deter would-be
criminals from physically damaging
the sensor. The patented INFORMER®
function, designed primarily as a
diagnostic tool, monitors for sensor
blockage and can help identify a
Queue Logic Event Processing
The microcontroller in the DT900
converts all incoming microwave
and PIR signals from analog-to-digital
format. If the signal is determined
to be valid it enters the Queue Logic
Event Process. This process stores
the valid signals within a moving
window of time, keeping up to
eight events for each signal type.
Based on the First In First Out
(FIFO) concept, Queue Logic
requires a sophisticated on-board
microcontroller to make advanced
calculations for qualifying a sequence
of events as an actual alarm.
Self-Test and Continuous
Supervision for High Reliability
This industrial-grade sensor performs
multiple levels of supervision. The
INFORMER function checks each
technology continuously. The
microcontroller conducts a self-test
of the sensor’s functions at regular
intervals, and reports any trouble
using the on-board trouble relay.
Designed for Harsh Environments
Vandal resistant housing combined
with a zero clearance bug guard make
the DT-900 series ideal for commercial
and industrial applications such as
warehouses, large retail facilities,
manufacturing sites and schools.
The on-board microcontroller
automatically adjusts the microwave
and PIR thresholds to compensate
for environmental disturbances not
related to actual intrusion events.
True temperature compensation
continually optimizes the performance
of the PIR to account for changes
in room temperature. Environmental
noise compensation keeps common
environmental disturbances such as
fluorescent lights from causing the
microwave to false alarm.
– PIR for intrusion detection– Microwave for intrusion detection– Active infrared for anti-masking
(DT900 and DT906)
Digital Fluorescent Light Filter
Digital filter virtually eliminates interference
caused by fluorescent lighting.
Sensor sensitivity can be set to
high for fastest capture, to normal,
or to low for maximum false alarm
immunity in harsh environments.
Sensitivity Two to four steps within field-of-view, depending on
sensitivity setting selected.
Zero Clearance Bug Guard
The bug guard provides zero clearance, protecting the
pyro chamber from insects that can cause false alarms.
Small Animal Immunity
Immune to small animals commonly found in commercial
conditions (birds, rodents, snakes).
Designed with the installer in mind, the DT900 contains a
large wiring space, protective clear plastic covers over the
circuit boards to prevent damage, two end-of-line terminals,
flashed over LEDs visible at great distance, a fast-install wall
mounting plate for the included swivel mounting bracket
and easy vertical and horizontal adjustment.
Mirror Optics For Long Range
The DT900 series utilizes custom designed mirror optics to
provide effective capture at long range. Each model is easily
selectable between two ranges.
The LEDs will display codes to indicate an anti-masking
condition, INFORMER condition, trouble condition, and
recallable codes to indicate INFORMER results and whether
or not there was a self-test failure.
Advanced Commercial/Industrial Features
In addition to anti-masking (DT900/DT906), the DT900
Series has command input for initiating a self-test remotely,
has CENELEC two wire input options and has a remote
LED enable input.