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
• Microcontroller-Based Dual Technology
microcontroller-based advanced signal processing, provide excellent
detection while virtually eliminating false alarms and costly service calls.
• Sensor Sabotage Prevention
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 sabotage situation.
• Queue Logic Event Processing
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
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
the DT-900 series ideal for commercial and industrial applications such as
warehouses, large retail facilities, manufacturing sites and schools.
• Self-Adjusting Thresholds
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
• Three Microcontroller-based Sensitivity Modes
for maximum false alarm immunity in harsh environments.
• Zero Clearance Bug Guard
insects that can cause false alarms.
• Small Animal Immunity
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
effective capture at long range. Each model is easily selectable between two ranges.
• LED Diagnostics
condition, trouble condition, and recallable codes to indicate INFORMER results
and whether or not there was a self-test failure.
• Advanced Commercial/Industrial Features
for initiating a self-test remotely, has CENELEC two wire input options and
has a remote LED enable input.
• PIR Fields-of-View (Edges)
• DT900 Series Products; Model/Range