Inst ToolsInst ToolsInst Tools
  • Courses
  • Automation
    • PLC
    • Control System
    • Safety System
    • Communication
    • Fire & Gas System
  • Instrumentation
    • Design
    • Pressure
    • Temperature
    • Flow
    • Level
    • Vibration
    • Analyzer
    • Control Valve
    • Switch
    • Calibration
    • Erection & Commissioning
  • Interview
    • Instrumentation
    • Electrical
    • Electronics
    • Practical
  • Q&A
    • Instrumentation
    • Control System
    • Electrical
    • Electronics
    • Analog Electronics
    • Digital Electronics
    • Power Electronics
    • Microprocessor
  • Request
Search
  • Books
  • Software
  • Projects
  • Process
  • Tools
  • Basics
  • Formula
  • Power Plant
  • Root Cause Analysis
  • Electrical Basics
  • Animation
  • Standards
  • 4-20 mA Course
  • Siemens PLC Course
Reading: Industrial Flame Detectors
Share
Notification Show More
Font ResizerAa
Inst ToolsInst Tools
Font ResizerAa
  • Courses
  • Design
  • PLC
  • Interview
  • Control System
Search
  • Courses
  • Automation
    • PLC
    • Control System
    • Safety System
    • Communication
    • Fire & Gas System
  • Instrumentation
    • Design
    • Pressure
    • Temperature
    • Flow
    • Level
    • Vibration
    • Analyzer
    • Control Valve
    • Switch
    • Calibration
    • Erection & Commissioning
  • Interview
    • Instrumentation
    • Electrical
    • Electronics
    • Practical
  • Q&A
    • Instrumentation
    • Control System
    • Electrical
    • Electronics
    • Analog Electronics
    • Digital Electronics
    • Power Electronics
    • Microprocessor
  • Request
Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Inst Tools > Blog > Fire & Gas System > Industrial Flame Detectors

Industrial Flame Detectors

Last updated: August 19, 2020 4:40 pm
Editorial Staff
Fire & Gas System
1 Comment
Share
5 Min Read
SHARE

A flame detector is a fire detector that uses optical sensors to detect it. Here it is emphasized that the flame detector is used to detect the presence of fire, not heat.

Contents
Industrial Flame DetectorsInfrared (IR) DetectorUltra Violet (UV) DetectorDual IR (IR / IR) DetectorUV / IR DetectorUV / IR and Visible DetectorTriple IR (IR / IR / IR) DetectorCCTV (Video) Flame Detector

The working principle of a flame detector starts from that the fire will be detected by the presence of infrared and ultraviolet light spectrum, and from there a kind of microprocessor in the flame detector will work to distinguish the spectrum of light contained in the detected fire.

Industrial Flame Detectors

Industrial Flame Detectors

However, in its implementation, there are other light sources that are apparently not fire and contribute to the emission of light on infrared and ultraviolet waves where these light sources also affect the performance of the flame detector which results in false alarms.

Examples of these light sources are lightning flashes, welding arcs, metal grinding, hot turbines, reactors, and many more.

Flame Detector Spectrum

The following are some types of flame detectors on the market:

Infrared (IR) Detector

The infrared flame detector works on the infrared spectral band. The hot gas will emit a specific spectral pattern in the infrared region, where it will be censored by a Thermal Imaging Camera (TIC), a type of thermographic camera.

False alarms can be caused by other hot surfaces and thermal radiation in areas that are obscured by water and solar energy. The frequency in a Single IR Flame Detector has a sensitivity in the range of 4.4 micrometers with a response time of 3-5 seconds.

Ultra Violet (UV) Detector

Ultra Violet Detector works at wavelengths below 300 nm. This detector detects fires and explosions between 3-4 milliseconds through UV radiation emitted during ignition.

False alarms will be triggered by UV sources such as lightning, arc welding, radiation, and sunlight. And in the design of this implementation of UV Flame Detector, time-delay of 2-3 seconds is often used to reduce the intensity of false alarms.

Dual IR (IR / IR) Detector

The Dual IR flame detector compares the initial signal in the two infrared ranges. In this case, one sensor works in the range of 4.4 micrometers and the other sensor is at a reference frequency.

UV / IR Detector

UV / IR flame detector compares the initial signal in the two infrared ranges, namely the “AND” configuration and the ratio are related to each other to ensure the fire signal and minimize false alarms.

UV / IR and Visible Detector

For some detectors, a sensor for visible radiation will be added to the design with the aim of being able to better deal with false alarms or improve the detection range.

Triple IR (IR / IR / IR) Detector

Triple IR flame detectors compare three specific wavelength bands in the infrared spectral region and their ratios in relation to each other for reliable detection of fire in order to reduce false alarms.

In this case, one sensor will work in the range of 4.4 micrometers and the other sensor at the reference frequency. Triple IR detectors are also at risk of blurring caused by water and reduced sensitivity by sunlight.

CCTV (Video) Flame Detector

Closed-circuit television (CCTV) or web cameras can be used for video detection (wavelengths between 0.4 and 0.7 µm). like humans, cameras can also be blinded by smoke and fog.

In the development of the seven types of detectors, the last three types of flame detectors (UV / IR and Visible Detector, Triple IR Detector, and CCTV Flame Detector) are the most mentioned by the manufacturers to replace the other four detectors, especially UV / IR Detector which actually widely used but also many false alarms caused by objects, lightning, or heat caused by metals (among others: pipes) due to the sun’s sting, causing a puff of heat. And that’s why also at this time these three types of flame detectors are widely used in industry as an initial fire detector.

Author: Sandra Eka Ristianjani

Read Next:

  • Compare Point IR and Open Path Detector
  • Basics of Fire and Smoke Detectors
  • Infrared Gas Detectors Principle
  • Flame Ionization Detector Principle
  • Selection of Fire and Gas Detectors
Don't Miss Our Updates
Be the first to get exclusive content straight to your email.
We promise not to spam you. You can unsubscribe at any time.
Invalid email address
You've successfully subscribed !

Continue Reading

Calibration of Gas Detectors
Basics of Sprinkler System
What is Fire Alarm System?
Types of Fire and Gas Detectors
Fire Water Sprinklers Working Principle
PLC based Gas Detection System using Ladder Logic Project
Share This Article
Facebook Whatsapp Whatsapp LinkedIn Copy Link
Share
1 Comment
  • Pradeep says:
    May 26, 2020 at 6:24 pm

    What is flame scanner? Is it same as flame detector? Can a single flame scanner distinguish between coal fired and diesel fired in thermal power plant boiler?

    Reply

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Stay Connected

128.3kFollowersLike
69.1kFollowersFollow
210kSubscribersSubscribe
38kFollowersFollow

Categories

Explore More

Smoke Detector Testing Procedure
Hydrogen Sulfide Gas Detector Calibration Procedure
Factors for Setting Alarm Levels on Toxic Gas Detectors
What is Manual Call Point (MCP) ?
LEL vs Percent By Volume vs Parts Per Million vs Parts per Billion
Why Negative Readings in Gas Detectors ?
Basic Guidelines for Selection of Fire and Gas Detectors
Gas Detection System Abbreviations

Keep Learning

Deluge Valve Operation using Solenoid Valve Animation

Deluge Valve Operation

Fire Extinguishers Mock Test

Fire Extinguishers Mock Test

Rate of Rise Thermal Detectors Working Principle

Rate of Rise Thermal Detectors Working Principle

Argonite Fire Suppression System Animation

Argonite Fire Suppression System Working Principle

Explosive Limit in Fire and Gas System

What is an Explosive Limit? – Lower Explosive Limit (LEL)

Heat Detector Testing Procedure

Heat Detector Testing Procedure

Portable Gas Detectors Calibration Procedure

Portable Gas Detectors Calibration Procedure

Purpose of End of Line (EOL) Resistor in Fire & Gas System ?

Why we use End of Line (EOL) Resistor in Fire and Gas System ?

Learn More

Evolution of Air Compressors

The Evolution of Air Compressors: From Power to Silence

port-guided globe valve plug

What is Port-guided Globe Valve ?

Fieldbus Analog Input Function Block

PLC Program for Water Level Control

PLC Program for Water Level Control Logic

Level Measurement Objective Questions

Level Measurement Objective Questions

Accelerometer Vibration Probe

Accelerometer Vibration Probe Principle

Closed Tank DP Level Transmitter

How to Find LRV and URV of Closed Tank DP Level Transmitter

D flip flop in PLC

D Flip Flop PLC Ladder Logic

Menu

  • About
  • Privacy Policy
  • Copyright

Quick Links

  • Learn PLC
  • Helping Hand
  • Part Time Job

YouTube Subscribe

Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Welcome Back!

Sign in to your account

Username or Email Address
Password

Lost your password?