S111/121 Solar Blind Flame Detectors

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Infra Red
Flame Detection
The Onshore Choice
S111/121
Solar Blind Flame
Detectors
Key Features
•
Completely solar-blind for use outdoors
High sensitivity with exceptional interference
rejection
BASEEFA approved EEX ia IIC T5
Housing protection IP65
Integral stainless steel 316 mounting bracket
The use of micropower electronics allows multiple detectors to operate on conventional 2
wire detection circuits
Built in response indicator
High immunity to smoke, dust and grime
•
From many years experience in the design and manufacture of Infra-Red Flame Detectors, we have invented and patented the
single sensor infra-red flame detector with optical filtering, producing the S111 and S121 detectors for use outdoors in a wide
range of applications. Specifically designed for use in the demanding environments of the onshore petro-chemical industry, the
S111 and S121 detectors incorporate an abrasion resistant sapphire window in a protective housing to meet IP65.
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S111/S121
S111/121 Solar Blind Flame Detectors
With their unique filter and sensing system, the S111 and S121
detectors can be used in locations where other types of flame
detectors give false alarms due to external interference e.g. sunlight
and arc welding.
Operation in the infra-red spectrum around 4.4 microns ensures
that the detector will not blinded by thick smoke and will be tolerant
to dirty environments.
Use in Hazardous Areas
The S111 and S121 detectors meet the requirements of EN50-020
Part 7 and are BASEEFA certified EEx ia IIC T5. Other approvals
include FM, CSA, VdS, SA and most marine bodies. As part of an
intrinsically safe circuit, they are suitable for Zones 0,1 and 2,
where Group IIC gases or lesser hazards are CONTINUOUSLY
present in explosive concentrations.
With their long range, tolerance to dirty environments and high
immunity to external interference, the S111 and S121 detectors
represent a major advance in the technology of hydrocarbon
flame detection.
S111 detector with milspec plug and socket connector
Benefits
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No false alarms from welding, sunlight or high
intensity lamps
Low maintenance costs
Quick response to carbon fires
Long range performance
Applications
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S121 detector with 20mm gland entry and internal connections
Oil Refineries
Fuel Storage and transfer bays
Gas pumping stations
Military and commercial aircraft hangars
Petrochemical works
Gas turbine enclosures
Printing presses and paperworks
Note: For offshore applications, the S - 131 is recommended. Please refer to the technical
information sheet PSF058.
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S111/121
Performance
The detector is designed to respond to a minimum time of three seconds, this being the optimum signal processing time constant of the
circuitry. Varying sizes of fire will be detected at given distances in the same time and the graph shows the typical ranges for the detection
of the flames, for given areas of liquid fuels.
Note: These results are based upon the fire reaching equilibrium rates of combustion in still atmosphere.
Typical Response
The S111 and S121 detectors, by virtue of their construction and rejection of spurious radiation, are suitable for use both indoors and outdoors
in a wide range of applications. They will detect a 0.1m2 petrol fire a 20 m on the centre line within approximately 10 seconds. A 0.4m 2 fire is
detected at 40m. Installation arrangements are specific for the environment and risk situation.
Directional Sensitivity and Range
The polar diagram shows that the maximum detector sensitivity lies on the detector central axis. The variation of relative ranges with angle of
incidence up to the maximum is shown.A
The range of the detector will vary with the type of fuels as indicated above.
Centre line range against petrol flames.
Relative range as function of angle of incidence.
DETECTOR
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S111/S121
S200 PLUS Series
Technical Information
Mechanical
Material:
Impact resistant moulded plastic (light grey)
Dimension mm:
160H x 80W x 60D (without bracket)
Weight (including bracket): 1.7 Kg
Gland Entry (S121):
Metal Parts (external &
internal):
1 x 20mm
Bright Stainless Steel 316 to BS1449
Pt 2 316 S 161
Electrical
Supply Voltage:
Quiescent Current:
Alarm Current:
Connections:
S111
S121
15.5 to 25.5V dc
100µA max. at 20V dc
60 mA max
Milspec plug sealed into body
Milspec mating socket with 2m of 4 core PVC
insulated, braid screened PVC sheathed cable
to DEF Std 61-12 Pts 4
One 4 way, 2.5 mm heavy duty terminal block
Environmental
Operating Temp Range:
-30°C (-40°C with reduced range) to + 70°C
Storage Temperature:
-40°C to + 80°C
Relative Humidity:
95% (100% intermittent)
Enclosure to:
Hazardous Area:
IP65
Classification BASEEFA EEx ia IIC T5
Suitable for use in zones 0,1 and 2 where
group IIC gasses or lesser hazards are present in
explosive concentrations.
UK approved by BASEEFA
Certificate No. Ex 812333
Certificate
Performance
Range:
Field of View
Response Time:
0.1m2 petrol at 20m
0.4m petrol at 40m etc
85° min inclusive
2 secs min, 5-10 secs typical
Mounting Bracket
Weight (Kg):
1.1
Construction:
Bright Stainless Steel 316 to BS1449
Pt 2 316 S 161
Axial Rotation:
360°
Elevation
80°
Fixing Details:
M8 bolts (location template provided)
The right is reserved to modify or withdraw any product or service without notice
Technical Information Sheet PSF022U Issue 3
www.tycofire.com
©Thorn Security Ltd. 2000

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