SenTRI Sensors
This following is information on the
SenTRI product range. The SenTRI
product integrates dual angle smoke,
heat and carbon monoxide gas detection
with electronic sounder, speech and LED
flasher (Strobe) in one assembly.
General specification
Operating voltage 35V - 41V
Weight 110g
with base - 170g
Dimensions 117mm diameter by
49.6mm height
With base the height
increases to 63.8mm
IP rating IP30
IP20 when mounted on
a metal back box
Enclosure ABS
Colour RAL 9010
Approval LPCB approved
Storage Temperature
-20°Cto70°C
Ambient operating
temperature
-10°Cto50°C
Relative Humidity 95% non condensing
(5°C to 45°C)
Heat (H) Standard
EN54 : Part 5
Optical (O) Standard
EN54 : Part 7
Sounder (S) Standard
EN54 : Part 3
Multi sensor standard
CEA 4021
EN54-17 : 2005
(section 4.8)
data:
V
max 42V IC max 0.4A
V
nom 40V IS max 1A
V
min 24V IL max 20mA
V
SO max 16V ZC max 0.1W
V
SO min 8V
Information on minimum sound output levels to include polar
dispersion is covered in a technical note TECH7018.033,
available on request from manufacturer.
Base
The base has terminals for external cables to allow it to be
electrically connected to the panel loop circuit and to the
monitored input or output circuit. Any SenTRI device can be
plugged into an SenTRI base.
Base Gasket
The optional foam rubber base gasket S4-BASE-GASKET can
be fitted to the base to prevent water damage from dripping
water from the ceiling.
Base labels
An optional label SEN-BASE-LABEL can be fitted to the base.
The label can be marked up with device location information.
Indicators
The SenTRI has a red LED that gives an indication in the event
of a fire. The LED can be configured to flash periodically, as an
'in operation' confirmation, this indication is given system-wide at
all SenTRI device.
Dust Cover
A dust cover is supplied with the SenTRI, to prevent dust from
building work contaminating the sensor. The cover is removed
prior to the commissioning of the fire alarm system.
Do's and Don't
&
DO NOT locate smoke detectors where products of
combustion may be present such as kitchens,
garages, furnace rooms, welding shops etc.
DO NOT locate heat detectors above boilers or
heaters or where the temperature is normally very
high or liable to sudden fluctuations.
DO NOT locate smoke or heat detectors: -
• In dusty or dirty environment.
• Near heating or air-conditioning grilles.
• Outdoors in stables, sheds etc.
• In excessively damp areas.
• In dead air spaces at the junctions of
ceilings and walls.
• At ceiling locations where a ‘thermal
barrier' may exist.
Follow recommendations detailed in section 22
of BS5839 : Part 1 : 2002
.
Siting
A SenTRI device plugs into a dedicated Base that is installed in
the protected premises. The Bases should be sited in locations
as defined by the project plans and by BS5839 : Part 1 : 2002.
27
SenTRI ONE System
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