Data Sheet for Product

s Canada Limited Cerberus® PRO
Product Overview ─ (continued)
• Multi-criteria fire detector ( UL 268)
• Heat detector (
UL 521) with five (5) possible
field-selectable temperatures;
combined with four (4) rate-of-rise options
• Direct, in-duct (plenum) detector (
UL 268A)
• Supervisory monitoring for temperature ranges
• NFPA 76 (Telco Standard) as VEWFD
• Low-temperature warning signal at 40°F (4.4°C)
─ for sprinkler systems, per NFPA 25 / NFPA 72
Model OOH941 ─ which provides extremely accurate and
reliable fire detection with built-in redundancy
─ utilizes
advanced, multi-criteria detection technology known as
ASA (Advanced Signal Analysis) that allows the
detector to distinguish non-threatening deceptive
phenomena.
For instance, the signals from the detector’s sensors are
monitored and processed via the
ASA-patented
algorithm technology, which combines the signals into a
neural network to create an intelligent, multi-criteria
detector.
The encompassing result is a detector that provides
enhanced detection to a wide range of products of
combustion
─ while offering unsurpassed rejection
to nuisance-alarm sources, such as: dust, steam,
aerosols and other deceptive phenomena that could
cause false alarms.
Since Model OOH941 is a (2) two-wire, addressable
device, it is able to function as a multi-purpose detector
─
satisfying smoke and heat detection in a singular,
aesthetically pleasing package. Further, Model OOH941
serves as an extremely cost-effective, viable solution that
saves product, installation and maintenance costs
(compared to other multiple-detector alternatives). Each
detector fits into one (1) wall-or-ceiling footprint, and
only occupies one (1) address on the signal-line circuit
(SLC).
A patented forward-and-backward, light-scattering
technology
─ which is able to distinguish both small and
large products of combustion
─ operates at the core of
each Model OOH941 detector.
Additionally, each Model OOH941 provides an
environmental-friendly solution to ionization detectors,
eliminating the need for a radioactive source and
eventual disposal requirements. Thus, each detector is
capable of detecting both smoldering and flaming fire
─
all in ecologically efficient manner
─ and is a valid, RoHS-
compliant (Restriction of Hazardous Substances)
detection alternative to ionization detectors.
Two (2) thermal sensors make each Model OOH941
detector a robust, reliable device suitable for the most
challenging applications.
Operation
Forward-and-Backward
Light-Scattering Technology
1. Heat sensors 4. Forward scatterer
2. Receiver 5. Labyrinth
3. Backward scatterer
The high-quality, optical-electronic measuring chamber for
each Model OOH941 houses the following components:
 Two (2) optical transmitters
 One (1) optical receiver
 Two (2) thermal sensors
The transmitters illuminate the smoke particles from different
angles: one sensor acts as forward scatterer, the other sensor
as a backward scatterer. The scattered light then hits the
receiver (photodiode) and generates a measurable electric
signal. The combination of a forward-and-backward scatterer
facilitates optimum detection, as well as differentiates
between light-and-dark particles / particle size.
This type of detection creates standardized, responsive
behavior, thus optimizing the differentiation between
wanted signals and deceptive phenomena.
In addition, the
heat sensors make it possible to detect fires without smoke
generation.
This scenario generates the following advantages:
 Early detection of all fire types of fire ─ whether
they generate light-or-dark smoke, or no smoke
 The fire detector can be operated at a lower sensitivity
level, thus achieving a higher immunity against false
alarms that may otherwise be caused by cold aerosols
(e.g
. ─ by smoking, electrical welding, etc.)
In the case of an open fire, the smoke sensitivity
is heightened by a temperature increase
─ which
means that a detection-reliability level that is
comparable to a wide-spectrum smoke detector
─
can be achieved and maintained.