Flame Sensors

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Flame Sensors
www.Talentum.co.uk
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Introduction

• Low Power 24Vdc Operation, 4-20mA or Relay
  Interface

• Sensitive to Flickering IR or UV/IR Emitted by
  Flames

• Detects Open Flames Glowing Embers

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Why use a Flame Sensor

• Heat smoke detection are the most economical
  method

If detection is required to be

• Unaffected by convection currents, draughts or
  wind

• IR sensors are tolerant of fumes, vapour, steam,
  dust and mist

• Detection at over 25m away

• Fast reaction

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Applications

• Aircraft hangars
• Automotive industry spray booths,
  parts manufacture
• Coal handling plant
• Pharmaceuticals - fume cupboards

• Paper manufacture
• Power plants
• Textiles - dust collection
  - fillings
• Waste handling
• Woodworking

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Applications to Avoid

• Ambient temperatures above 55C
• Where the detector may view -

• Flickering or moving hot objects (gt200 C)
• Sunlight falling directly onto IR optics
• Flood or spot lights directly on optics
• Large amounts of flickering reflections

• Exposure to severe weather
• Close proximity to RF sources

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Theory of Operation

• Detector Optics

Detector Optics
Signal Processing
Input/Output Interface
A
B
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Optical Spectra
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Detector Optics
Other Types 4.3µm
Talentum IR Detectors
B
A
B
A
4.3
Excluding Atmospheric Absorption
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Types of Sensors Available
Typical Sensor Cost
Detection Methods
Talentum Flame Sensors
Highest
Triple IR
1,000
UV/IR
Dual IR

(IR²)
Immunity to False Sources
4.3 µm
Single IR
100
UV
Low
UV
Visible
Near IR
Mid IR
0.4µm
0.75µm
3.0µm
Optical Spectrum
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Flame Sensor Selection
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Theory of Operation

• Detector Optics

• Signal Processing

Detector Optics
Signal Processing
Input/Output Interface
A
B
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Flame Flicker Frequency Spectra
Signal Processing
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Typical Flame Flicker
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Energetic Flame Flicker
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Theory of Operation

• Detector Optics

• Signal Processing

• Input/Output Interface

Detector Optics
Signal Processing
Input/Output Interface
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Input/Output Connections
IN
-IN
R
R-
FLAME (N/O) Relay RL1
FAULT (N/C) Relay RL2
Remote Test Input
24Vdc Supply Input
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Selecting Options (Series 16000)
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Output Signalling (Series 16000)

• Quiescent/Alarm Current Selectable Options
• 3 / 9mA Min. Flame Relay (RL1)
• 4 / 20mA No Relays
• 8 / 20mA or 8 /28mA
• Flame Fault Relays (RL1 RL2)

• Latching or Non-latching

Current (mA)
Flame Sensor (Series 16000)
1

24Vdc Supply Voltage
2
-
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Output Interface Option
Typical Response on seeing Flame
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Output Interface Option
Typical Response after last Flame is seen.
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Output Interface Option
Typical Response to a Burst of Flame
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Output Interface Option
Typical Response on seeing Flame - Break supply
to reset
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Sensor Performance

• Class 1 performance as defined in

EN54Part 10 Flame detectors point detectors

• Yellow flickering flame of approximately 0.1m²
• or
• clear flame of 0.25m²
• at
• 25m

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Sensor Performance

• 0.1m² flicking yellow flame at 25m

• 0.4m² flicking yellow flame at 40m

0.1m²
0.4m²
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Selection of Fires Tested
Solids
Liquids
Gases

• Aviation Fuels
• Ethanol
• Methylated Spirits
• n-Heptane
• Paraffin
• Petrol

• Butane
• Fluorine
• Hydrogen
• Natural Gas
• Off Gas
• Propane

• Coal
• Cotton
• Grain Feeds
• Paper
• Refuse
• Wood
• Or just Dust from the above

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Sensitivity Setting

• Class 1 is the normal setting (High)

• Class 3 reduced sensitivity (Low)

DIL Switch (Front cover removed)
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Sensor Field of View
90 Cone
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Sensor Field of View
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Calculation of Detection Distance
²
²
²
H
W
L



Height
Width
Length
²
²
²
example
5
10
20



22.9m
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Installation Accessories
Stainless Steel Adjustable Mounting
Bracket Talentum Part No 007127
Typical Arrangement
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Installation Accessories
Stainless Steel Weather Shield Talentum Part No
012545
Typical Arrangement
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Testing Commissioning

• a. Self test by applying 24Vdc to Terminals 3 4

- Activates IR Test Source within Detector
Flashing Yellow LED -
b. The best way to test a flame detector is with
a real flame.
Talentum Part No 010018
c. Simulated Flame Testing.
Talentum Part No 016091
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Thank You