Technical information

Page 41
These detectors are capable of
detecting the visible smoke
produced by materials which
smoulder or burn slowly, i.e. soft
furnishings, plastic foam etc;. or
'smoke' produced by overheated
but unburnt PVC. These detectors are particularly
suitable for general applications and areas where
cable overheating may occur e.g. electrical
services areas. The novel design of the
asymmetrical sampling chamber and signal
processing techniques stop unwanted alarms
caused by very small insects. i.e. thrips. Smoke
entering the sampling chamber scatters the infra-
red light pulses onto a photodiode These pulses
are converted to an electrical signal which is
transmitted as an analogue value.
Datasheet - Product Code PSF84 “M600/900 Low
Profile Fire Detector Range”
Manual - Vol01B-03-D6 “Detectors Fire Manual”
Addressable 900 Series Detectors
Optical Smoke
The M900 series are a range of low profile
addressable fire detectors. These unobtrusively
styled detectors have a number of unique design
features to improve their operation, installation
and ease of servicing.
Through innovative design the M900 Series
detectors have reduced the installation and
servicing time to a minimum, needing only one
visit to complete the installation. The detectors
also have a park position, which eases detector
servicing.
The unique smart key feature ensures that the
address is transferred to the base after
installation. This ensures that the detector
addresses are not accidentally confused during
service visits.
The M900 series includes the unique Carbon
Monoxide CO fire detector, which provides a
general purpose fire detector with unprecedented
early detection capability and excellent false
alarm immunity. The CO fire detectors are the first
choice for sleeping risks.
Also included within the range is the intelligent
high performance optical smoke (H.P.O.) detector.
The use of the patented optical sensing chamber,
together with refined signal processing, has
enabled the introduction of a smoke detector
suitable for fast, reliable smoke detection of both
slow and fast developing fires. The H.P.O. can be
seen as a truly universal smoke detector, suitable
for most applications.
Features
• Unique early detection CO fire detector
• Intelligent Universal HPO Smoke Detector
• Low profile, discreet and unobtrusive
• Superior performance and reliability
• Unique ‘Smart Key’ feature
• Designed for fast, easy installation
• Optional Locking Kit
• Integral and remote alarm LED
• Series of Product Approvals
The M900 Low Profile detectors can be custom
made in several colours, please contact the
Walthamstow office for details.
These detectors react to the whole
range of fire products from slow
smouldering fires, producing
visible particles to open flaming
fires producing large numbers of
very hot smaller sized aerosols. It
combines optical and heat detector technology to
detect clear burning fire products which hitherto
could only be easily detected by ion-chamber
detectors.
For normal ambient conditions, the high
performance optical detector behaves as a
normal optical detector. When a rapid rise in
temperature is detected the sensitivity of the
detector increases and the presence of smoke
will confirm a fire condition which will be
transmitted as an alarm level. The HPO will not
operate on a rate of rise of temperature alone.
Datasheet - Product Code PSF84 “M600/900 Low
Profile Fire Detector Range”
Manual - Vol01B-03-D4 “Detectors Fire Manual”
High Performance Optical Smoke
Product Codes Approval Branded Model
516.055.001.A LPCB ADT MR901T
516.055.001.T LPCB Thorn MR901T
516.055.001.Y LPCB Tyco MR901T
516.055.031 UL Thorn 912HP
515464 UL Grinnell 912HP
Body Optical Ionisation HPO R of R Heat CO
LPCB MR901 MF901 MR901T MD901 MU901
NSTC MF901 MR901T
UL/FM 912P 912I 912HP 912H
Marine MR901M MF901M MD901
The CO fire detector is a unique
general purpose fire detector
which provides very early warning
of slow smouldering fires. Ideal for
sleeping risks the CO fire detector
is also well suited to many
applications where heat detection is insufficient
but smoke detection causes false alarms.
As CO travels more freely than smoke the
positioning of CO fire detectors is more flexible.
This feature is particularly useful in large complex
structures such as atria and warehouses, where
positioning of smoke detectors is difficult. The
MU901 is LPCB approved in normal and high
sensitivity settings.
Datasheet - Product Code PSF94 “Carbon
Monoxide Fire Detector”
Manual - Vol01B-03-D7 “Detectors Fire Manual”
Carbon Monoxide Fire
Product Codes Approval Branded Model
516.059.001.A LPCB ADT MU901
516.059.001.T LPCB Thorn MU901
516.059.001.Y LPCB Tyco MU901
Product CodesApproval Branded Model
516.057.001.A LPCB ADT MR901
516.057.001.T LPCB Thorn MR901
516.057.001.Y LPCB Tyco MR901
515463 UL Grinnell 912P
516.057.031 UL Thorn 912P
516.057.401 Marine Thorn MR901M